Merge pull request #3711 from DJSnapshot/bugfix

Bugfix for custom AI sprites
Merge pull request #3715 from DJSnapshot/bugfix

Bugfix for gamemode vote delay
Fix foe #3713
Megaphones will have to be fixed separately, since they are on dev branch.
Fix for #3677
Flags were set backwards AND on wrong var
Fix for #3686
Thign now drops all stuff before turning into a tree.
Partial fix for #3697
Would not carry over gutter and such, only species-specific languages.
Full fix would require moving languages out of mob into mind, and I am really lazy, this will cover 98% cases.
Fix for #3628
Stops dead people from sending PDA messages.
Fix for #3667
Merge pull request #3720 from comma/master

Couple o fixes
Merge pull request #3722 from Baystation12/master

Master -> Dev