Merge pull request #229 from matthesrieke/develop

Develop
Merge pull request #232 from matthesrieke/develop

move unregistration of listener to onDestroy.
refactoring: do not use a reference to a Track object in CommandListener
first prototype "track as reference"; fix issues with tests
fix UI Activity test (IllegalStateException regarding Theme/Sherlock)
shutdown commandlistener before init.

might exist multiple times - depending on race conditions.
Merge pull request #234 from matthesrieke/feature-track-as-reference

Feature track as reference
StreamTrackEncoder and some periphering stuff
Let TrackDAO and Util use the StreamTrackEncoder
add some debugging statements
fix issue with sampling rate in config (1s -> 1ms; not converted)
change to FileEntity in order to be able to repeat a request
Merge pull request #236 from matthesrieke/feature-streaming-json

Feature streaming json
Merge pull request #9 from enviroCar/develop

Develop