BETA v2.043 update

One of the final updates for the BETA version. v2.043 brings some bug fixes and a LOT of small tweaks.

Here's a list of changes: -Screenshot taking for Steam is now enabled -Updated level 2 backdrop -Updated some tilesets (Aleb's house in level 2 for instance) -Removed most of the anti-aliasing on the level 6 backdrop for a more pixel-perfect look -Supercow now equips his special gear for the underwater level! -Added a missing checkpoint in level 2 room 3 -Small graphical improvements to the Prologue -Some added secret areas in level 2 and 3 -[Bug fix] Triggering a cutscene after Player 2 had just died resulted in a crash -[Bug fix] Dying in tutorial level would reload last save game -[Bug fix] Using the bomb on level 6 boss too fast after it spawned resulted in a crash -[Bug fix] Zap gun beam would sometimes go through enemies without hitting them -Many other small bug fixes