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.

Demos/ConstraintDemo/ConstraintDemo.cpp

@@ -60,9 +60,7 @@ int main(int argc,char** argv)
 
 void	ConstraintDemo::initPhysics()
 {
-	
-
-	ConstraintSolver* solver = new SequentialImpulseConstraintSolver;
+	//ConstraintSolver* solver = new SequentialImpulseConstraintSolver;
 	//ConstraintSolver* solver = new OdeConstraintSolver;
 
 	CollisionDispatcher* dispatcher = new	CollisionDispatcher();