* version check fixes
* fixed configure states
* fixed indent
* use SDL_TriggerBreakpoint in Unix::exit
* parameter check in System.mkdir and use getAbsoluteWritePath() in the filesystem
* fixed APPNAME and added missing APPNAME_FULL
* removed code from caveexpress that is already in engine space
* only use string header, not String
* added FileSystem::shutdown
* html5 port

* compiles but does not yet run