Using NimbusBase_Android 1.0.1
Add GDrive as server
Update google api version
Merge branch 'develop'

Conflicts:
	app/src/main/java/com/nimbusbase/nimbusbase_android_tutorial/Singleton.java
Fix merge error
Merge branch 'master' of https://github.com/NimbusBase/NimbusBase_Android_Tutorial