INSTALL: use --user...
INSTALL: use --user...

Signed-off-by: James McCoy <91ae71a1168cea0b65ac9975da69d5a7753116be@users.sourceforge.net>

ProgVal/Limnoria-test,ProgVal/Limnoria-test,Ban3/Limnoria,jeffmahoney/supybot,Ban3/Limnoria,haxwithaxe/supybot,buildbot/supybot,frumiousbandersnatch/supybot-code