Barcode support
Fixed receiver leak
Moar tests
Set default collection values if not specified in the config read via barcode
Bumped compileSdkVersion and targetSdkVersion up
Updating to work with config format
Fixed testGetTimeAgoString_Multiple test.
Bump version code and number and a dev tag to it.
Merge pull request #93 from nightscout/wip/barcode#74

Barcode support #74