Files Added EnterCodeViewController

1. Implemented restroom to work for mens and women’s restrooms in facilities tab and also each floor view controller where facilities are displayed.
2. Modified NavigateTableViewController to take care of men’s restroom and women’s restrooms instead of restrooms.
3. Added commenting to home view controller, navigationviewcontroller, aboutdetailsviewcontroller, aboutthisappviewcontroller.
4. implemented button in navigationviewcontroller to allow user to switch to view EnterCodeViewController to enter code displayed on exhibits in order to locate themselves.
Pending: Code to parse plist file and convert the code to exhibit name.