Updated allocT implementation to cast the returned void* to a T*.

Moved builtin memory tag names to top of source file because it didn't like being forward declared. TODO: Revisit this later
Fixed compilation error where the source-local function get_eng_unit did not return the modified value.
Shuffled include order around to fix compilation issues.

include/core/basalt_memory.h

@@ -79,7 +79,7 @@ namespace basalt
 		
 		template<typename T>
 		T* allocT(u64 num_elements, MEMORY_TAG tag)
-		{ return alloc(num_elements*sizeof(T), tag); }
+		{ return (T*)alloc(num_elements*sizeof(T), tag); }
 		template<typename T>
 		T* setzeroT(T * dst, u64 num_elements)
 		{ return setzero(dst, num_elements*sizeof(T)); }