implements game_end/action_end_game on linux
Adds sound_pitch
Merge branch 'master' of https://github.com/enigma-dev/enigma-dev
Merge branch 'master' of https://github.com/enigma-dev/enigma-dev
Merge branch 'master' of https://github.com/DarkAceZ/enigma-dev

Conflicts:
	ENIGMAsystem/SHELL/Platforms/xlib/XLIBwindow.cpp
	ENIGMAsystem/SHELL/Platforms/xlib/XLIBwindow.h
Merge branch 'master' of https://github.com/enigma-dev/enigma-dev
Merges upstream changes
Added set_working_directory
Merge remote-tracking branch 'upstream'
Fixes var comparison operator communitivity
Merge pull request #257 from DarkAceZ/master

Extra functions and var operator fixes