Update README.md
Added WS.sensor WS.sensors and made client persist and reuse connections
Make sure to call the server callback if we reuse a connection
Added a WS.shutdown() command and an action that shuts down
Added ping/pongStatus and reset to camera view
Major improvements to GlassKeyboard.

Launch activities such as Settings, GlassSettings, and Launchy
using single keys. Press 'i' for help.