Version 3: Bugfixes and Tuning

I spent a bit of time on this today. It doesn't feel that different, but a number of things have been tweaked and polished.

• Rebuilt Infinity power up to remove some bugs and make things feel better.
• Adjusted cost of Torrent to be consistently 50 Mystic. Added "Torrent Ready" message.
• Hitting bosses with the Torrent drops Mystic now.
• Adjusted when bosses appear. Now you'll never be introduced to a new standard opponent and have to fend off a boss in the same wave.
• Adjusted Chitidi (Fourth opponent type) movement to make them a bit more predictable.
• Fixed Fade (Eighth opponent type) bug causing only one to see you and make all chase you.
• Added autofire option for Infinite powerup.