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/SimulationIslandManager.h

@@ -29,6 +29,7 @@ class SimulationIslandManager
 
 public:
 	SimulationIslandManager();
+	virtual ~SimulationIslandManager();
 
 
 	void InitUnionFind(int n);	
@@ -56,3 +57,4 @@ public:
 };
 
 #endif //SIMULATION_ISLAND_MANAGER_H
+