SGDK2 Fully Supports HTML5

SGDK2 can now export fully functional games to HTML5 format rather than just the maps and sprites. There are still a few limitations, but functional games straight out of the IDE are now possible. For details of supported functions, see https://docs.google.com/spreadsheet/pub?hl=en_US&hl=en_US&key=0AuyO-2scTVuRdFBpTUZoM0NNRzhXVXdud1E5a3A4cFE&output=html.