FREM Sprite32! Beta release + Mac build

This build introduces a myriad of new/updated challenges, a couple of new tutorials, and some under-the-hood modifications to the FREMScript language architecture.

The game is very nearly finished, just a few more weeks to go until the Steam release! The latest build takes FREM Sprite32! into Beta. We've also uploaded a Mac build.

Hereafter, everything is just finalizing a few copy additions, soundtrack arrangements, and final optimization passes.

Cheers!

-- Negative(-11) Games Division