Implemented Coins and Certificate

Will explain in person.
paypal sandbox setup and updating the app name
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
Merge pull request #10 from nitishjindal/master

paypal sandbox setup and updating the app name
updating the static txt
Merge pull request #11 from nitishjindal/master

updating the static txt
Implemented Rewards Menu

working, no blocked items yet
Unselectable items in list

Made coins not selectable if user hasn't earned them...working on
graying them out. Also fixed some small typos in some other things.
Grayed out menu items

Rewards menu items grayed out until they're earned.
help button addition in action bar
Merge pull request #12 from nitishjindal/master

help button addition in action bar
More work on Reward stuff

Not much
Redid art

Changed coins, icons, etc, and project name
Merge remote-tracking branch 'upstream/master'
Notifications

Some notifications implemented, not quite working yet
Notifications Auto-cancel

One liner
Enabled search in the app
merging changes from upstream