Lots of changes and bug fixes. See extended description.

Added ability to load pipeline config from reference to string resource
in FunfManager service metadata.
Activity probe behaves like 3 again - one sendData call for aggregate
Activity, rather than one for each row.
Removed gson jars - it's included in the source already.
Added ability to register and update pipelines to FunfManager.
Fixed DatedContentProvider sorting.
Added ability to load DatedContentProvider timestamp from SharedPrefs.
Slowed down SensorProbe sampling frequency in hopes of reducing power
consumption.
Fixed DatabaseService to properly acquire a wakelock while working.
Made UploadService an IntentService, rather than trying to replicate
IntentService functionality in a standard service.
InternalAudioMediaProbe for collecting audio on internal and external
storage separately.
Property on AudioMediaProbe to specify internal or external storage.
Fixed SimpleLocationProbe logic for determining when a location is good
enough.