Changes to wxWidgets/SDL2 port :

- Updated UI
- OpenGL 3.0 with GLSL/GLSLP-support
- Improvements to Windows version
- Minor changes/bugfixes
Patch from bit.

src/wx-shaderconfig.h

@@ -0,0 +1,13 @@
+#ifndef SRC_WX_SHADERCONFIG_H_
+#define SRC_WX_SHADERCONFIG_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+void shaderconfig_open(void* hwnd, struct glslp_t* glsl);
+#ifdef __cplusplus
+}
+#endif
+
+
+#endif /* SRC_WX_SHADERCONFIG_H_ */