Efficiency for thread completion of rendered pixels (less time for locks)

Supported WxWidgets 2.9+ (through preprocessor global setting, manually set)
Reworked Thread Cleaning up for other versions of WxWidgets.
Fixed Unhanded Expression errors by changing how the Thread / Queue system handles exit commands (no longer using try/catch for that).
Fixed Exit command on Threads to when successful exit 0 (previously 5003 wxDefault success, but looks like an error in Output console)
Fixed Issues to Build in Unix and MacOSX environments
-Next update support for Unix / Project file with tutorial
Signed-off-by: Daniel Rosser <[email protected]>

Author: danoli3

wxRaytracer/raytracer/Cameras/Camera.h

@@ -6,7 +6,7 @@
 
 #include "Point3D.h"
 #include "Vector3D.h"
-#include "Multithread.h"
+#include "MultiThread.h"
 #include <vector>
 
 
@@ -171,4 +171,4 @@ inline void
 Camera::render_stereo(const World& w, float x, int pixel_offset, const std::vector<Pixel>& pixels)
 {}
 
-#endif
+#endif