Closes #26. Add PHP support.

- Update README for setup and usage.
- Add PHP example code
- Tested on Mac
Update README.md

Added link to PHP section under Advanced Language Setup.
Merge branch 'master' of github.com:donaldpipowitch/atom-beautify
Closes #24. Add Python (PEP 8) support.

- Add reusable cli-beautify for external, non-Node beautifiers.
Closes #25. Add Ruby support.
See #18. Add .travis.yaml to start using Travis CI.
See #18. Add required dependencies for other languages.
See #18. Trying to get PIP installed.
See #18. Installing Pear with Homebrew for PHP tests.
See #18. Update brew.
See #18. Brew tap homebrew/science to install Pear.
See #18. Attempt to install Pear. Homebrew does not work.
See #18. Cannot install Pear for PHP on Travis CI server. Removing.
Merge pull request #32 from Glavin001/master

More language support