v0.2.2 release

CHANGELOG

Added

• A new plastic logo. (984590c) and (3c1b2fe)
• Icon to the GTK UI app. (edacb0a)

Changed

• Numerous optimizations in emulation.

Fixed

• Windows slow performance bug, this was due to the way we handled sleep
  between frames.

WARNING

The format of pst (plastic save state) files have changes, do not try to load old save states.

For windows users: plastic.exe, for linux users plastic_gtk