Unicode in Application Names

The script doesn't currently support unicode characters in the application names. Our first instance of this is Übersicht. We've tried munging it but it's very quickly a mess.

```
ecrist@mackerel322:~/Patch-Starter-Script-> python patchstarter.py -o . --patch-only /Applications/Übersicht.app
Traceback (most recent call last):
File "patchstarter.py", line 263, in
main()
File "patchstarter.py", line 100, in main
filename = '{}-patch.json'.format(app_id)
UnicodeEncodeError: 'ascii' codec can't encode character u'\u0308' in position 1: ordinal not in range(128)
```

Start with patchstarter.py at the filename construction on line 100 and reproduce the issue using the documented command with /Applications/Übersicht.app. Trace how the application name becomes app_id and verify that the script can create the patch filename without a UnicodeEncodeError for this name.

Written by the indexing model from the issue text.