Fix particles in Actor Viewer.
Expand terrain in Actor Viewer.
Change background to black so it blends with the LOS texture more
nicely.
This was SVN commit r9172.
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.