Fixed over 500 compile warnings. Mostly:

* Unused variables.
* Missing newlines at ends of #included files.
* signed int loop variables where the termination condition is an unsigned 'get number of' function.
* 'NULL' used inappropriately for an integer or character constant (NULL is a pointer)
* abstract base classes with no virtual destructor.
* Floating point constants used to initialise integer variables.

Bullet/BroadphaseCollision/OverlappingPairCache.h

@@ -77,4 +77,5 @@ class	OverlappingPairCache : public BroadphaseInterface
 
 
 };
-#endif //OVERLAPPING_PAIR_CACHE_H
+#endif //OVERLAPPING_PAIR_CACHE_H
+