etc/xmonad/xmonad.hs: Add missing utility keybindings•••M-S-<Space> in xmonad was set to mimic i3's floating toggle behaviour,
but only the part of switching back from floating to tiling. The tiling
to floating change still remains as "mod-<mouse-click>".
This had to be done because the default keybinding for that action for
xmonad is mod-t, which is being overriden and set to "wms date".
bin/vm: v2•••- support -S flag for toggling snapshot mode;
- support -G flag for toggling GUI mode;
- dynamically discover available images;
- dynamically find available ports to map to 22.