can not found conf.py

broke at max osx 10.10, setup by local git repo

```
Rex-mbp:docs rex$ pwd
/Users/rex/pycode/galley/docs
```

```
Rex-mbp:docs rex$ galley
Exception in thread Thread-1:
Traceback (most recent call last):
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/threading.py", line 810, in __bootstrap_inner
self.run()
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/threading.py", line 763, in run
self.__target(*self.__args, **self.__kwargs)
File "/Library/Python/2.7/site-packages/galley-0.1.0.dev20150122015705-py2.7.egg/galley/worker.py", line 177, in sphinx_worker
warningiserror, tags)
File "/Library/Python/2.7/site-packages/Sphinx-1.3b2-py2.7.egg/sphinx/application.py", line 125, in __init__
confoverrides or {}, self.tags)
File "/Library/Python/2.7/site-packages/Sphinx-1.3b2-py2.7.egg/sphinx/config.py", line 240, in __init__
execfile_(filename, config)
File "/Library/Python/2.7/site-packages/Sphinx-1.3b2-py2.7.egg/sphinx/util/pycompat.py", line 83, in execfile_
f = open(filepath, 'rbU')
IOError: [Errno 2] No such file or directory: 'conf.py'
```

Reproduce the failure from the repository's docs directory using the galley entry point. Start with galley/worker.py around sphinx_worker and the reported Sphinx configuration load of conf.py; determine the expected configuration path and verify that running galley from the documented checkout no longer raises the missing-file error.

Written by the indexing model from the issue text.