buildingMenu, hellcat heli, gang markers, fixed textures

* added buildingMenu for cops to repair blown up buildings
* added button on houseMenu for cops to repair damaged homes
* added the hellcat heli for cops and medics
* added gangMarkers so you can see your gang members locations on the map in real time
  * you can only see the gang members that have GPS equipped
  * you can only see the gang if you your self has a GPS equipped
  * you can only be seen by other gang members if you have GPS equipped

* fixed some small mission bugs as well as some textures for medic vehicles
* enabled IR equipment on vehicles