Added NightscoutPreferences getters and setters for PWD Name and Preferred units
Added PWD name to preference panel
Offline pebble support (requires offline pebble watch face)
Disabled battery reading again
Merge branch 'rmbatindicator' into wip/offlinepebble

Conflicts:
	app/src/main/java/com/nightscout/android/MainActivity.java
	app/src/main/java/com/nightscout/android/preferences/PreferenceKeys.java
Time ago reported incorrectly if watch face under certain conditions.
Merge branch 'kl.updatebarcode' into wip/offlinepebble

Conflicts:
	app/src/main/java/com/nightscout/android/MainActivity.java
	app/src/main/java/com/nightscout/android/preferences/AndroidPreferences.java
	app/src/main/java/com/nightscout/android/preferences/PreferenceKeys.java
	app/src/main/res/values-it/strings_activity_settings.xml
	app/src/main/res/xml/pref_general.xml
	core/src/main/java/com/nightscout/core/preferences/NightscoutPreferences.java
	core/src/main/java/com/nightscout/core/preferences/TestPreferences.java
Set PWD name to "Camping" for easy watch face identification
Setting default background to black
Bumping build tools version to 21.1.2
Set PWD name to "Camping" for easy watch face identification
Setting default background to black
Bumping build tools version to 21.1.2
Merge remote-tracking branch 'origin/wip/offlinepebble' into wip/offlinepebble
reverting back to 21.1.1
Merge branch 'kl.updatebarcode' into wip/offlinepebble

Conflicts:
	core/src/main/java/com/nightscout/core/preferences/NightscoutPreferences.java
	core/src/main/java/com/nightscout/core/preferences/TestPreferences.java
Implementing recommended changes from code review
Merge pull request #106 from nightscout/wip/offlinepebble

Pebble camping mode
wip