Introduced about dialog. New JSON schema.
Merge remote-tracking branch 'origin/master'

Conflicts:
	app/src/main/java/emergencycall/intertech/com/emergencycall/messaging/LocationTransmitter.java
	app/src/main/java/emergencycall/intertech/com/emergencycall/ui/MainActivity.java
	app/src/main/res/values/strings.xml