v0.6.8

Release 0.6.8 fixes:

• PS3/4 controllers not supported
• No controller dead zone
• Spin/yaw oversensitive
• NPCs stuck under drum tower

And adds:

• Dialogue boxes follow UI style

I wasn't planning on another release so soon after 0.6.7, but my (Xbox-compatible) controller went haywire (I blame the cat) and the most convenient replacement was a Playstation-compatible (nominally PS4, but identified as PS3). Which (apart from being awful) promptly crashed DragonMail. So I couldn't leave the fix to such a significant problem unpublished.