Updated embedded version of Mongoose.
Add Mongoose readme
Integrate I2C code to grab sensor data from the rangefinder and compass module.  This data is currently printed to stdout and to a file that the web UI can read, but it doesn't yet affect vehicle behaviour.
Web UI refactoring.  Now split into separate versions for tablet and laptop use (tablet displays in portrait, doesn't use the "hold" action - laptop displays in landscape, does use the "hold" action).  Both displays now include sensor data.
Updated README
Fixed mangled indenting and added some more comments