Implemented dynamically changing action bar menu items.
Added DiningSession packing and unpacking.
Removed mock dining session
Merge pull request #66 from glee23/master

Dynamically shows/hides check in, view bill buttons
Merge branch 'master' of https://github.com/blasv/DineOn

Conflicts:
	DineOnUserApplication/src/uw/cse/dineon/user/DineOnUserActivity.java