Preview Alpha 5

This preview release marks a major milestone in layout, performance, content, and functionality. Here's some highlights:

• The full Liberated Pixel Cup asset set is now included with working .spec files (well, the art which fully complied with the base sheet actions, anyway).
• Hue, saturation, and brightness sliders are available on a per-layer basis, allowing for extreme customization.
• Performance has been substantially improved, though be aware that it can be a memory hog over long periods of usage (this will be fixed later).
• There's been a lot of UX and UI polish, making the tool actually usable now.
• ...and your typical slew of bug fixes along the way.

Sprite Magic is now at a point where feedback on usability would be very welcome, so do try it out and let me know what you think!

EDIT: There was a bug in the packager which caused this packaged build to be non-functional. I didn't bother to update the packager script for this revision because - hey - it's a preview release. At any rate, I updated the packaged version so that it'll run, just be aware that you'll want a later version of setup.py if you want to make your own builds with build.bat.