text from https://wiki.blender.org/index.php/User:Nicks/Gsoc2010/Docs should be moved to https://www.blender.org/manual/game_engine/physics/world.html#obstacle-simulation
https://wiki.blender.org/index.php/User:Rking/Doc:2.6/Manual/Animation/Editors/NLA https://docs.blender.org/manual/en/dev/editors/nla/index.html (might be done already)
https://wiki.blender.org/index.php/User:Sergof/GSoC2012/Documentation