Add formatter for new PhoneRadio sensor.
Added ConnectionStrength formatter
Set locale for date formating in JSON to Locale.us

This ensure the data is in the same format, no matter what the phone
locale is
Release bluetooth

Make sure the Broadcastreceiver for bluethooth is unregistered when we
are done sensing
Merge remote-tracking branch 'nlathia/master'

Conflicts:
	src/com/ubhave/dataformatter/DataFormatter.java
Minor merge bugfixes
Added support for list of locations
Better locations serialization
Added PassiveLocationSensor

First version for serialisation of PassiveLocationData
Debugging passive location
Fixed copyright

Added copyright notice to the files created at Idiap
Merge pull request #2 from PuckCh/master

Merging Idiap's changes