in sway/wayland, make sure that the wayland socket is cleared, which
seems to cause issue for some unspecified reason.
also, while at it, improve code so that the environment dict that is
passed in is *not* modified.
fixes#628
OK - so I have to admit I *hate* the fact that PIP seems to require a
subdirectory named like the library.
But since the PIP package is something really nifty to have (thanks to
@tony again!!!), I updated the codebase to hopefully conform with what
PIP expects. Testruns so far look promising...