Performance
#TWEAK: Added some multi-threaded optimizations to Pixmap
to enable faster image processing on load.
#TWEAK: Added a fast byte[] to ColorRgba[] converter for faster
Pixmap loading in the editor.
#TWEAK: Added a fast string to DataType lookup to replace a
slow Enum.TryParse in XmlFormatter.
#TWEAK: Removed the ReadSingleDocument call from
XmlFormatter as it is never used by us and can be slow for very
large files.
#HACK: Modified the ProjectFolderView so that it doesn't attempt
to load Scene files until double clicked. This means we can no
longer set gravity using the object inspector, which we never use
anyway, but in return the editor feels much more responsive when
dealing with large XML scene files.