Add a close button to the sandbox intro.
Fix a scene deserialization bug.
Change the text of a few labels for consistency.
Move the Details and Transform panels to their own files.
Improvements to the scene editor.
 - Reset camera
 - Set scene node transform to camera
 - Small refactor.
Add the ability to open a script listed in a Script component in the scene editor.
Add Help menu.

This commit also adds the Game menu, but nothing is implemented in this yet.
Fix a bug where drop-down menus could possibly be drawn under other elements.
Remove the old editor hints section and replace it with a simple text file.
Add a menu item to show the editor usage notes.
Small change to add some groundwork for improved prefab handling.
Renaming SceneNodeClass to Prefab.
More renaming.
Experimental work on an improved prefab system.
Update CodeBlocks project.