Make hg add foo; hg mv foo bar work. - foo will be removed (the user has a copy of its contents in bar) - bar will not be marked as a copy (there was no committed version of foo). We print a warning telling that to the user. Fixes issue269.

*** failed to import extension badext: bit bucket overflow
extension 'hgext.gpg' overrides commands: sigs sigcheck sign
hg help [COMMAND]

show help for a command, extension, or list of commands