Added I2C implementation of US sensor
Added optional minimum update interval
Fixed bugs
Bugfixes
Callback update for I2C sensors now only called when input data is expected.
Updated header and I2C implementation of US sensor
Added header
Implementation of MindSensors sensors. Currently only AbsoluteIMU-ACG
Test program for AbsoluteIMU-ACG sensor
Merge pull request #28 from FransDuijnhouwer/master

Improvements and bug fixes for ThreadSafeBrickPi