Changelog
* 2dbbc13 update docs
* 31cc903 update .gitignore
* 5687192 update gui layout
* 35e1358 add build version information
* 5aa4813 add gui support for multi monitor desktop
* 2fa272b add exit command
* 8a02cfa fix remaining tiling state after sig termination
* 72b4f39 fix client swap on stacked areas
* 4694503 fix tracking on disabled workspace