Added simple level creator with Tiled integration

Added MapBuilder utility class to create levels.
Added TiledConverter class to convert Tiled .lua files into game .map
files.
Maintenance - Moved Managers into their own package under
gameutilities.managers.
Updated ReadMe with level creation instructions.
NOTE: This commit breaks Android because of a file management issue
unique to the system. Future commit will include fix. (Not tested on
iOS)