set up obstacle.java for super class
Add in Obstacle.java: please extend it when you start develop any kind
of obstacle.

Fix Map: Gps will stop tracking when the activity is in the Pause mode.
Add in function: loading animation
Add in: loading animation in to Signup
fixed bug of loading animation
fixed loading animation problem
Make the background(map) slightly transparent
Merge remote-tracking branch 'origin/Dashboard' into Dashboard

Conflicts:
	src/uq/deco7381/runspyrun/activity/LoginActivity.java