Moved database files to new location in project.
Added Collada loader.

This class imports and exports collada files to and from the system.
Added Collada model for a cube.
Added version number for ColladaLoader.
Updated code for new database locations.
Added code to test collada importing of models.
Updated code for new collada model importing.

SmartBlock database doesn't store model data anymore, but now a
reference to a Collada file containing all the relevant model data.