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/CollisionDispatch/SphereSphereCollisionAlgorithm.h

@@ -51,4 +51,5 @@ public:
 
 };
 
-#endif //SPHERE_SPHERE_COLLISION_ALGORITHM_H
+#endif //SPHERE_SPHERE_COLLISION_ALGORITHM_H
+