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/SimplexDemo/SimplexDemo.cpp

@@ -34,8 +34,8 @@ VoronoiSimplexSolver	simplexSolver;
 float yaw=0.f,pitch=0.f,roll=0.f;
 const int maxNumObjects = 4;
 const int numObjects = 1;
-int screenWidth = 640.f;
-int screenHeight = 480.f;
+int screenWidth = 640;
+int screenHeight = 480;
 /// simplex contains the vertices, and some extra code to draw and debug
 GL_Simplex1to4	simplex;
 
@@ -115,4 +115,6 @@ void	SimplexDemo::initPhysics()
 
 	SimdTransform tr;
 	tr.setIdentity();
-}
+}
+
+