Make collision code placement more like original (+ small fixes)

# Conflicts:
#	premake5.lua
#	src/CMakeLists.txt
#	src/collision/Collision.cpp
#	src/core/Collision.h

src/collision/ColBox.h

@@ -0,0 +1,22 @@
+#pragma once
+
+#include "SurfaceTable.h"
+
+struct CBox
+{
+	CVector min;
+	CVector max;
+	CVector GetSize(void) { return max - min; }
+	void Set(const CVector &min, const CVector &max) {  this->min = min; this->max = max; }
+};
+
+struct CColBox : public CBox
+{
+	uint8 surface;
+	uint8 piece;
+
+	void Set(const CVector &min, const CVector &max, uint8 surf, uint8 piece);
+	using CBox::Set;
+
+	CColBox& operator=(const CColBox &other);
+};