Fix format of burst sensors.

Was a json string containing a vector, now it's a json vector.
Merge pull request #74 from senseobservationsystems/fix-burst_sensor

Fix format of burst sensors.
Fixed registration of the loudness dataproducer for subscription
Merge pull request #75 from senseobservationsystems/fix_subscribe_loudness

Fix register loudness dataProducer and screen activity
Add preference to avoid uploading burst sensors.
Merge pull request #77 from senseobservationsystems/feature-optionally_send_burst

Add preference to avoid uploading burst sensors.
Changed default motion sample rates:

- idle -> 1 sample per minute
- in motion -> 1 sample per 30 seconds.
Merge pull request #78 from senseobservationsystems/feature-reasonable_sample_rate_values

Feature reasonable sample rate values
Fixed the sensor registration for the Zephyr external sensors
Fixed indentation
Merge pull request #82 from senseobservationsystems/fixZephyrExternalSensors

Fixed the sensor registration for the Zephyr external sensors
Added a preference for using the mobile internet energy saving mode
fixed indent
changed auth pref to mainpref
Removed unused import
Simplified the dataTransmitter code
Merge pull request #83 from senseobservationsystems/pref3GenergySaving

Pref3 genergy saving
Removed the sample rate change to 10 seconds when using burst mode
When the sense service crashes or is started the main application is started
Added try catch for sending data to consumers