Added basic support for the Philips Hue lights.

This is a first commit adding basic on/off support.
Functionality and doc update

Added effect support and updated the documentation so that it follows
the requires format.
Added functionality to control the color and the brightness of a lamp
Added function to control hue, saturation and brightness in one command
Merge pull request #131 from hollie/add_philips_hue_support

Adding support for the Philips Hue light system