Show "incompatible version" message instead of "no such room" on try to join room with another protocol version

fix for regression issue #669 "Lobby: User context-menu of offline user shows all options as if user was still online"

small cleanup etc

don't show 'follow' entry for players that are in lobby

regression fix: reallow offline players to be added to friendslist/ignore list

fixing position of spawning sparkles of target gears by applying a filthy workaround for a filthy bug in the filthy filthy doStepCase handler. please read issue #721 ps: filthy.

whip: visual enhancements (hat'n'dust) as suggested by nemo

Quick and simple dynamite AI without precalculated retreat and without accurate dynamite physics model (no bounce). Still does pretty well, using it mostly off cliffs.

Initial pass at bounciness. To try it out, or lfBouncy on girder in uLandGraphics (search for the word graphically)

Animate hedgehogs healths inside team health bar. Proper animation for the case when max team health grows is lost though.