Assorted `fontmake` problems when building Schticks (2-axis varfont)

I’ve run into a number of problems with `glyphsLib` and `fontmake` when trying to build Schticks Text, a 2-axis variable font based on the STIX Two Text fonts (OFL). The fonts I’m talking about are in the [https://github.com/twardoch/schticks-fonts-ofl](https://github.com/twardoch/schticks-fonts-ofl), `Schticks/Sources/25-gly-mm-width1` subfolder.

## Configuration

* Mac OS X 10.12.3
* Glyphs 2.4.1 (965)
* Homebrew-installed Python 2.7.13

I've just installed the devel `fontmake` by running in the repo:

```
pip install --user -r dev-requirements.txt .
pip install --user .
```

so I had:

* booleanOperations-0.6.4
* cu2qu-1.1.2.dev0
* defcon-0.2.1:
* fonttools-3.6.0
* fontmake-1.1.1.dev0
* glyphsLib-1.3.1.dev0
* MutatorMath-2.0.2.dev0
* ufo2ft-0.3.2.dev0

I also did it via:

```
pip install --user -r requirements.txt .
pip install --user .
```

So I had:

* booleanOperations-0.6.4
* cu2qu-1.1.1
* defcon-0.2.1
* fonttools-3.6.0
* glyphsLib-1.3.0
* MutatorMath-2.0.1
* ufo2ft-0.3.1

In **both configurations**, when running **fontmake** like this:

```
fontmake -g SchticksText-MM.glyphs --verbose 'DEBUG' --keep-overlaps --production-names -o variable
```

on the **SchticksText-MM.glyphs** font in [25-gly-mm-width1/bak](25-gly-mm-width1/bak) font from my [https://github.com/twardoch/schticks-fonts-ofl](https://github.com/twardoch/schticks-fonts-ofl) repo, I get a number of problems.

## Spurious illegal names

`fontmake` reports one **illegal glyph name** but such a glyph name is not in the font.

```
INFO:fontmake.font_project:Checking Glyphs source for illegal glyph names
WARNING:fontmake.font_project:Found 1 glyph names containing hyphens: B: -219
WARNING:fontmake.font_project:Replacing all hyphens with periods.
```

## com.adobe.type.autohint data

The glyphs contain a custom `com.adobe.type.autohint` entry which makes `glyphsLib` fail. Stuff in `userData` that cannot be parsed should be ignored.

```
userData = {
com.adobe.type.autohint = ;
};
```

#### Traceback

```
INFO:glyphsLib:Parsing .glyphs file
Traceback (most recent call last):
File "/Users/adam/Library/Python/2.7/bin/fontmake", line 11, in
load_entry_point('fontmake', 'console_scripts', 'fontmake')()
File "/Users/adam/Developer/vcs/github/googlei18n/fontmake/Lib/fontmake/__main__.py", line 171, in main
project.run_from_glyphs(glyphs_path, **args)
File "/Users/adam/Developer/vcs/github/googlei18n/fontmake/Lib/fontmake/font_project.py", line 368, in run_from_glyphs
glyphs_path, family_name)
File "/Users/adam/Developer/vcs/github/googlei18n/fontmake/src/fonttools/Lib/fontTools/misc/loggingTools.py", line 372, in wrapper
return func(*args, **kwds)
File "/Users/adam/Developer/vcs/github/googlei18n/fontmake/Lib/fontmake/font_project.py", line 93, in build_master_ufos
family_name=family_name)
File "/Users/adam/Developer/vcs/github/googlei18n/fontmake/src/glyphslib/Lib/glyphsLib/__init__.py", line 91, in build_masters
filename, include_instances=True, family_name=family_name)
File "/Users/adam/Developer/vcs/github/googlei18n/fontmake/src/glyphslib/Lib/glyphsLib/__init__.py", line 64, in load_to_ufos
data = load(file_or_path)
File "/Users/adam/Developer/vcs/github/googlei18n/fontmake/src/glyphslib/Lib/glyphsLib/__init__.py", line 44, in load
return loads(fp.read())
File "/Users/adam/Developer/vcs/github/googlei18n/fontmake/src/glyphslib/Lib/glyphsLib/__init__.py", line 53, in loads
data = p.parse(value)
File "/Users/adam/Developer/vcs/github/googlei18n/fontmake/src/glyphslib/Lib/glyphsLib/parser.py", line 43, in parse
result, i = self._parse(text, 0)
File "/Users/adam/Developer/vcs/github/googlei18n/fontmake/src/glyphslib/Lib/glyphsLib/parser.py", line 55, in _parse
return self._parse_dict(text, i)
File "/Users/adam/Developer/vcs/github/googlei18n/fontmake/src/glyphslib/Lib/glyphsLib/parser.py", line 83, in _parse_dict
res[name], i = self._parse(text, i)
File "/Users/adam/Developer/vcs/github/googlei18n/fontmake/src/glyphslib/Lib/glyphsLib/parser.py", line 61, in _parse
return self._parse_list(text, i)
File "/Users/adam/Developer/vcs/github/googlei18n/fontmake/src/glyphslib/Lib/glyphsLib/parser.py", line 104, in _parse_list
list_item, i = self._parse(text, i)
File "/Users/adam/Developer/vcs/github/googlei18n/fontmake/src/glyphslib/Lib/glyphsLib/parser.py", line 55, in _parse
return self._parse_dict(text, i)
File "/Users/adam/Developer/vcs/github/googlei18n/fontmake/src/glyphslib/Lib/glyphsLib/parser.py", line 83, in _parse_dict
res[name], i = self._parse(text, i)
File "/Users/adam/Developer/vcs/github/googlei18n/fontmake/src/glyphslib/Lib/glyphsLib/parser.py", line 55, in _parse
return self._parse_dict(text, i)
File "/Users/adam/Developer/vcs/github/googlei18n/fontmake/src/glyphslib/Lib/glyphsLib/parser.py", line 83, in _parse_dict
res[name], i = self._parse(text, i)
File "/Users/adam/Developer/vcs/github/googlei18n/fontmake/src/glyphslib/Lib/glyphsLib/parser.py", line 70, in _parse
self._fail('Unexpected content', text, i)
File "/Users/adam/Developer/vcs/github/googlei18n/fontmake/src/glyphslib/Lib/glyphsLib/parser.py", line 145, in _fail
raise ValueError('%s:\n%s' % (message, text[i:i + 79]))
ValueError: Unexpected content:

load_entry_point('fontmake', 'console_scripts', 'fontmake')()
File "/Users/adam/Developer/vcs/github/googlei18n/fontmake/Lib/fontmake/__main__.py", line 171, in main
project.run_from_glyphs(glyphs_path, **args)
File "/Users/adam/Developer/vcs/github/googlei18n/fontmake/Lib/fontmake/font_project.py", line 368, in run_from_glyphs
glyphs_path, family_name)
File "/Users/adam/Developer/vcs/github/googlei18n/fontmake/src/fonttools/Lib/fontTools/misc/loggingTools.py", line 372, in wrapper
return func(*args, **kwds)
File "/Users/adam/Developer/vcs/github/googlei18n/fontmake/Lib/fontmake/font_project.py", line 93, in build_master_ufos
family_name=family_name)
File "/Users/adam/Developer/vcs/github/googlei18n/fontmake/src/glyphslib/Lib/glyphsLib/__init__.py", line 91, in build_masters
filename, include_instances=True, family_name=family_name)
File "/Users/adam/Developer/vcs/github/googlei18n/fontmake/src/glyphslib/Lib/glyphsLib/__init__.py", line 64, in load_to_ufos
data = load(file_or_path)
File "/Users/adam/Developer/vcs/github/googlei18n/fontmake/src/glyphslib/Lib/glyphsLib/__init__.py", line 44, in load
return loads(fp.read())
File "/Users/adam/Developer/vcs/github/googlei18n/fontmake/src/glyphslib/Lib/glyphsLib/__init__.py", line 55, in loads
cast_data(data)
File "/Users/adam/Developer/vcs/github/googlei18n/fontmake/src/glyphslib/Lib/glyphsLib/casting.py", line 510, in cast_data
_convert_data(data, True, _TYPE_STRUCTURE)
File "/Users/adam/Developer/vcs/github/googlei18n/fontmake/src/glyphslib/Lib/glyphsLib/casting.py", line 526, in _convert_data
_convert_data(cur_data, to_typed, cur_type)
File "/Users/adam/Developer/vcs/github/googlei18n/fontmake/src/glyphslib/Lib/glyphsLib/casting.py", line 528, in _convert_data
data[key] = cur_type.convert(data[key], to_typed)
File "/Users/adam/Developer/vcs/github/googlei18n/fontmake/src/glyphslib/Lib/glyphsLib/casting.py", line 78, in convert
return self.read(data) if to_typed else self.write(data)
File "/Users/adam/Developer/vcs/github/googlei18n/fontmake/src/glyphslib/Lib/glyphsLib/casting.py", line 309, in read
value = int(value)
ValueError: invalid literal for int() with base 10: '-77.5'
```

## TypeError: int() argument must be a string or a number, not 'list'

After I manually cleaned the offending portions in the `.glyphs` files using a text editor, and stored the font in [25-gly-mm-width1](25-gly-mm-width1), then run `fontmake` on it, I get:

```
TypeError: int() argument must be a string or a number, not 'list'
```

I have no idea what to do with this, so I cannot proceed any further.

#### Traceback

```
INFO:glyphsLib:Parsing .glyphs file
INFO:glyphsLib:Casting parsed values
Traceback (most recent call last):
File "/Users/adam/Library/Python/2.7/bin/fontmake", line 11, in
load_entry_point('fontmake', 'console_scripts', 'fontmake')()
File "/Users/adam/Developer/vcs/github/googlei18n/fontmake/Lib/fontmake/__main__.py", line 171, in main
project.run_from_glyphs(glyphs_path, **args)
File "/Users/adam/Developer/vcs/github/googlei18n/fontmake/Lib/fontmake/font_project.py", line 368, in run_from_glyphs
glyphs_path, family_name)
File "/Users/adam/Developer/vcs/github/googlei18n/fontmake/src/fonttools/Lib/fontTools/misc/loggingTools.py", line 372, in wrapper
return func(*args, **kwds)
File "/Users/adam/Developer/vcs/github/googlei18n/fontmake/Lib/fontmake/font_project.py", line 93, in build_master_ufos
family_name=family_name)
File "/Users/adam/Developer/vcs/github/googlei18n/fontmake/src/glyphslib/Lib/glyphsLib/__init__.py", line 91, in build_masters
filename, include_instances=True, family_name=family_name)
File "/Users/adam/Developer/vcs/github/googlei18n/fontmake/src/glyphslib/Lib/glyphsLib/__init__.py", line 64, in load_to_ufos
data = load(file_or_path)
File "/Users/adam/Developer/vcs/github/googlei18n/fontmake/src/glyphslib/Lib/glyphsLib/__init__.py", line 44, in load
return loads(fp.read())
File "/Users/adam/Developer/vcs/github/googlei18n/fontmake/src/glyphslib/Lib/glyphsLib/__init__.py", line 55, in loads
cast_data(data)
File "/Users/adam/Developer/vcs/github/googlei18n/fontmake/src/glyphslib/Lib/glyphsLib/casting.py", line 510, in cast_data
_convert_data(data, True, _TYPE_STRUCTURE)
File "/Users/adam/Developer/vcs/github/googlei18n/fontmake/src/glyphslib/Lib/glyphsLib/casting.py", line 526, in _convert_data
_convert_data(cur_data, to_typed, cur_type)
File "/Users/adam/Developer/vcs/github/googlei18n/fontmake/src/glyphslib/Lib/glyphsLib/casting.py", line 528, in _convert_data
data[key] = cur_type.convert(data[key], to_typed)
File "/Users/adam/Developer/vcs/github/googlei18n/fontmake/src/glyphslib/Lib/glyphsLib/casting.py", line 78, in convert
return self.read(data) if to_typed else self.write(data)
File "/Users/adam/Developer/vcs/github/googlei18n/fontmake/src/glyphslib/Lib/glyphsLib/casting.py", line 136, in read
return int(src)
TypeError: int() argument must be a string or a number, not 'list'
```