Constants.h fix

Added c function apiURL() that takes a
callFormat, region, and param for API call
(non of the Riot API calls have more than 1 param).
Returns a NSURL* pointer.
Added a tab bar controller for match history
Merge branch 'dennis' into chris
Forgot to include changes to prepareForSegue:sender:
Added all Riot API calls & new docs

All Riot API call patterns defined as constants
Added docs for apiURL()
restored my deletes