Intro + new camera system

New features

• A wonderful intro movie.
• A new, better & much more logical camera movement system!
• All interactions can be completed with the mouse only! Right click to enter the dungeons.
• Separated the "Save" function from "Quit & Save".
• Options menu.

Fixes

• Fixed a major world duplication glitch when dying in irradiated water after the first underground battle.
• Re-enabled automatic End Turn.
• Normal difficulty appeared too unforgiving. Units are now many times weaker in a normal setting.