Version 3.6.0

This is more of a maintenance release, but a few features slipped in as well:

• Support for the Google Cloud Speech API with recognizer_instance.recognize_google_cloud (thanks @Thynix!), plus documentation and examples.
• Automatic sample rate detection in speech_recognition.Microphone - this should fully resolve all the "Invalid sample rate" issues from PyAudio.
• Project now has automated tests and continuous integration with TravisCI. It's pretty nifty, and has already caught a few things during development!
• Keywords example for recognizer_instance.recognize_sphinx.
• Documentation improvements and updated advice in troubleshooting and library reference.
• Bugfix - Google Speech Recognition sometimes didn't return the text with the highest confidence (thanks @akabraham!).
• Bugfix - EOFError upon encountering malformed audio files; a proper exception message is now given.
• Updated FLAC binaries for OS X.
• Bugfix - invalid FLAC binary path on OS X (thanks @akabraham!).
• Code cleanup.