Compilation changes

Few compile time attempts to speed things up

Swap include guards for pramga once
Change compile options in the cmakeLists for source
generate a pch

small tweaks

Engine/source/util/imposterCapture.h

@@ -19,28 +19,22 @@
 // FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 // IN THE SOFTWARE.
 //-----------------------------------------------------------------------------
+#pragma once 
+#pragma once 
 
 #ifndef _IMPOSTERCAPTURE_H_
 #define _IMPOSTERCAPTURE_H_
-
-#ifndef _MATHTYPES_H_
 #include "math/mathTypes.h"
-#endif
-#ifndef _MPOINT3_H_
+
 #include "math/mPoint3.h"
-#endif
-#ifndef _MMATRIX_H_
+
 #include "math/mMatrix.h"
-#endif
-#ifndef _TVECTOR_H_
+
 #include "core/util/tVector.h"
-#endif
-#ifndef _TSRENDERDATA_H_
+
 #include "ts/tsRenderState.h"
-#endif
-#ifndef _GFXTEXTUREHANDLE_H_
+
 #include "gfx/gfxTextureHandle.h"
-#endif
 
 class GBitmap;
 class SceneRenderState;