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.

Extras/ConvexDecomposition/ConvexBuilder.h

@@ -79,7 +79,7 @@ class ConvexBuilder : public ConvexDecompInterface
 public:
 	ConvexBuilder(ConvexDecompInterface *callback);
 
-	~ConvexBuilder(void);
+	virtual ~ConvexBuilder(void);
 
 	bool isDuplicate(unsigned int i1,unsigned int i2,unsigned int i3,
 		unsigned int ci1,unsigned int ci2,unsigned int ci3);
@@ -108,3 +108,4 @@ public:
 };
 
 #endif //CONVEX_BUILDER_H
+