Modernized the Input class, added support for scancodes (still need to test a little bit more).

Improved SyntaxColorScheme.
Some minor improvements here and there.

src/tools/codeeditor/codeeditor.cpp

@@ -66,6 +66,7 @@ void mainLoop() {
 	}
 
 	if ( input->isKeyUp( KEY_F6 ) ) {
+		uiSceneNode->setHighlightFocus( !uiSceneNode->getHighlightFocus() );
 		uiSceneNode->setHighlightOver( !uiSceneNode->getHighlightOver() );
 	}