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/ColLine.cpp

@@ -0,0 +1,9 @@
+#include "common.h"
+#include "ColLine.h"
+
+void
+CColLine::Set(const CVector &p0, const CVector &p1)
+{
+	this->p0 = p0;
+	this->p1 = p1;
+}