Compile error solved, test program now runs successfully.
>Resources loading offloaded to resource classes themselves
	>Allows for better extension of resource management system
>ResourceManager can now be declared singleton and included in engine namespace
Minor update
>Removed unnecessary prints
>Tested resource multiaccess
	>Resource only loaded once
Resources can now only be unloaded when they are loaded
Implemented teardown function for resourcemanager
Mass loading and unloading added to ResourceManager
ResourceManager moved to engine namespace, there is no longer any need
to instantiate a resourcemanager.