Version 2.11 Release

Version 2.11 change log:

• Several crash fixes and other bug fixes. • Maps added during the stage transitions. • Some small level changes and one new level in the forest. • World 11 weapons added to the star menu. • Level editor has preset graphic themes for Tundra and Ruins. • Database has all the new W11 enemies (and some old ones that weren't in it yet). • Main menu song upgrade! The old one was from 3 years ago. • Hard Mode bonus levels re-added (absent from 2.1 because of time constraints).

This is just a small fixup patch before we start working on the big full release!