Added feature for getting the current foreground app and installed applications
Added AppsSensor class
Merge pull request #91 from senseobservationsystems/smellyfeetMerge

Added the usefull changes from the smellyfeet branch
Merge pull request #92 from senseobservationsystems/develop

Merged from develop
Updated the project with Phonegap library v2.9.1
Fixed the audio spectrum calculation.
Removed dc component
Added noise burst sensors
Merge pull request #93 from senseobservationsystems/audioSpectrum

Audio spectrum
Merged with the master
Added missing sensor initialization
Merge pull request #90 from senseobservationsystems/feature_App_sensor

Feature app sensor
Merged with develop