Fix rendering of underwater lines. Fix rendering of unit selection outlines in Atlas. Remove some obsolete hotkeys. This was SVN commit r7589.
Giant merge from http://svn.wildfiregames.com/hg-source/file/5fb522019d5e Infrastructure is largely complete, gameplay is largely missing Disabled by default; use command-line flag "-sim2" (Second attempt at commit...) This was SVN commit r7259.
