Added ground work for tester tool
tester tool works but needs to fill out list of acceptable datablocks and spawnclasses
navpaths now share 1 navmeshquery
AIControllerData now has a vector of area costs for different polyareas
General cleanup
A lot of instances where some function args are not actually modified in any way, meaning that it is better for performance to convert them into const references. This prevents an additional copy, which can help performance.
