Update UltraSonicSensors.java

Changes done by Erik, after Vic got the sensors to work. This code has not yet been tested.
Summary of changes:
1) Now that the PulseInput are opened and closed within the read() method, there is no need for corresponding instance variables. Removed leftInput, frontInput, and rightInput
2) Corrected spelling of righttStrobe to rightStrobe
3) Closing rightStrobe and frontStrobe in closeConnection()
4) Minor other changes; see diff
Merge pull request #1 from ecolban/patch-1

Update UltraSonicSensors.java
Update UltraSonicSensors.java
Eriks cleanup of ultrasonics according to Ytai's suggestions
Works good
Compass code included...not working...errors
version 140505A with compass...working
added compass code
Updated adt bundle to 20140321
Initial commit of try to consolidate classes in iAndroic2014
Fixed reference of libraries