Added TechRacer (still needs a lot of love), updated changelog

new implementation for Lua API DismissTeam. all hedgehogs of the team are now removed without using teamgone

move fixed test case out of 'todo'

Skip checkin on collision for frequently spammed gear types if collision gets huge instead of trying to delete mines.

move failing test into "todo" folder so that it can be excluded with ctest -E '^todo/'

Add scheme and weaponset for Construction Mode.

test case that spawns 2000 mines in a pit. run with ctest -R mines # only works if cmake was ran after pulling this commit

fix for issue #828: Manual placement animation is drawn twice

merge

make seduction thaw a frozen hog.