Merge branch 'GLSL-master'

Merge an endless story. The branch name is a lie, it was started as glsl, but now it is a complete reworked opengl3 backend.

It just began with simple changes which aren't supported on osx.
They either support ogl2 OR ogl3 core, but mixing isn't allowed.
As the branch name says, the vicious circle starts with GLSL, but just implementing one wasn't possible either:
- OSX supports only GLSL100 which doesn't support our shaders.
- Vertex Array Objects are needed for ogl3, but not supported on ogl2
- immediate mode isn't supported any more, so we must implement vertex buffers
- uniform buffers are recommended as else we would need tons glUniform
- postprocessing shaders have to be converted to glsl
- lots of smaller outdated issues and bug fixes :-)

Thanks at all for testing and at Sonic for converting all of our shaders to glsl130

And sorry for all upcoming bugs...

Source/Core/DolphinWX/Src/Main.cpp

@@ -64,6 +64,10 @@
 
 #endif
 
+#ifdef __APPLE__
+#import <AppKit/AppKit.h>
+#endif
+
 // Nvidia drivers >= v302 will check if the application exports a global
 // variable named NvOptimusEnablement to know if it should run the app in high
 // performance graphics mode or using the IGP.
@@ -232,6 +236,17 @@ bool DolphinApp::OnInit()
 		return false;
 	}
 #endif
+#ifdef __APPLE__
+	if (floor(NSAppKitVersionNumber) < NSAppKitVersionNumber10_7)
+	{
+		PanicAlertT("Hi,\n\nDolphin requires OS X 10.7 or greater.\n"
+				"Unfortunately you're running an old version of OS X.\n"
+				"The last Dolphin version to support OS X 10.6 is Dolphin 3.5\n"
+				"Please upgrade to 10.7 or greater to use the newest Dolphin version.\n\n"
+				"Sayonara!\n");
+		return false;
+	}
+#endif
 
 #ifdef _WIN32
 	if (!wxSetWorkingDirectory(StrToWxStr(File::GetExeDirectory())))