Segregate dropping of items according to their toss property; untossed items spawn during P_KillMobj; tossed items spawn during A_Fall. This gives accurate behavior for Heretic and ensures the tossed items can move freely once their spawner is non-solid.

git-svn-id: http://mancubus.net/svn/hosted/eternity/trunk@2615 86ba831e-150c-0410-ab35-e06eaae15ed9
Comparison of thingtype names during dropitem deletion should be case-insensitive.

git-svn-id: http://mancubus.net/svn/hosted/eternity/trunk@2616 86ba831e-150c-0410-ab35-e06eaae15ed9