Merge pull request #37 from senseobservationsystems/hotfix-bt_support

Fixed crash on devices without Bluetooth adapter
Changed default sort order to DESC, and used the param in the request to Sense (if provided).
Added a build file.
Added support to limit the number of values from a REST call (per_page-param).
Merge pull request #43 from bartkiers/getdata-fix

Hotfix: getData() limit and sort order parameters
Merge branch 'master' into unstable

Conflicts:
	src/nl/sense_os/service/storage/LocalStorage.java
Merge branch 'unstable' of https://github.com/senseobservationsystems/sense-android-library.git into unstable