Added a description to the achievement icon.
Set up thang types to now have a raster portrait icon if we want to give them custom ones not based on vector artwork.
Put the Markdown mode in there. (We can't figure out why it wasn't there or whether it ever worked or why it stopped working, but whatever.)
Fixed the markdown treema node after changes to the ace editor node on treema broke things.
Tweaked the goal id field schema to be a bit more stringent. Forces the id to be a slug.
Some simulation and ladder fixes. Preparing Criss-Cross tournament.
Fixed problem with loading levels with no Programmable Thanags, and fixed infinite loops while simulating single games when swapping out Simulators.
Merge branch 'master' into production