Committing some cleanups by avindra:

- fix numerous warnings
- make some variables unsigned
- remove redundant code and header inclusions
- make code more compact in lots of cases

Committing some additional changes by myself:
- additional header cleanups
- cleanup DX11 initialization/shutdown process (hinted at by avindra)
- Remove the cgD3D9 stuff from Externals since it's no longer needed

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@5903 8ced0084-cf51-0410-be5f-012b33b47a6e

Source/Plugins/Plugin_DSP_HLE/Src/main.cpp

@@ -108,13 +108,13 @@ wxWindow* GetParentedWxWindow(HWND Parent)
 {
 #ifdef _WIN32
 	wxSetInstance((HINSTANCE)g_hInstance);
-#endif
 	wxWindow *win = new wxWindow();
-#ifdef _WIN32
 	win->SetHWND((WXHWND)Parent);
 	win->AdoptAttributesFromHWND();
-#endif
 	return win;
+#else
+	return new wxWindow();
+#endif
 }
 #endif