Updated travel offer accept/reject services code. Implemented the new SimpleTravels service workflow. Community screen added. Fixed communityButton references. Refactoring on the community screen. Code refactoring.  Created UIColor category with class methods for common colors.  Added defines for hardcoded numbers in the code.  Fixed segue identifier for map screen. Added additional check for saveCommunity: action. Implemented getPeopleNearCurrentUser selector to get map people objects close to the current user.