interface to add parking spot through address and insert booking
Bug fixes to MakeBooking.java servlet. Added ajax request in
make_booking.js for MakeBooking.java. Make_booking.js should be changed to
use find_spots.js
Merge branch 'master' into MakeABookingServlet

Conflicts:
	parking/war/WEB-INF/web.xml
Cleanup and Fixes to MakeBookingServlet
-Currently isConflictFreeBooking() implementation checks in datastore
for existing Bookings with the provided parent_key for a ParkingSpot.
-Now using Find_spot.jsp Removed Make Booking from top_banner.