Call help() before loadconfig()

This avoids annoying error messages from config files being debugged
when running 'mr help'.

Signed-off-by: Lorenzo Cappelletti <lorenzo.cappelletti@gmail.com>
Make mr help work even if the mrconfig file is busted. Thanks, Lorenzo Cappelletti
Support "vcsh clone url repo" as trusted checkout syntax, while still supporting the old syntax.
Merge branch 'local_bootstrap' of https://github.com/lorcap/myrepos