Fixes #9. Nested options in .jsbeautifyrc are properly handled.
Closes #29. Improved the package.json

Including:
- Keywords
- Contributors
- Bugs URL
Closes #21. Parsing .jsbeautifyrc falls back to YAML, when JSON fails.
Closes #22. Use Atom Package Settings as configuration options.

- Fix issue for beautifying unsaved files.
Merge pull request #30 from Glavin001/master

More improvements