Chunky 0.9

- changed the minimap so that it renders existing chunks as blue pixels, and non-existing chunks as white pixels (this gives a better overview of the world)
- clicking in the minimap brings the view to the location where you clicked
- when highlighting blocks, non-highlighted blocks are rendered with a fog overlay to make the highlighted blocks more visible
- new chunk selection tools: select all, invert selection
- moved color selector to a dialog box in order to slim down the toolbox
- added quick parsing of chunks for a slight performance boost
- separated chunk loading and parsing for performance boost
- saves some of the loaded data so that switching layers is smoother
- don't re-render all chunks when switching layers, only re-render when the chunk has been re-parsed