beremiz

Add information how to make shelve command work with check_source.sh called from hg hook

and added coresponding flag handling in check_source.sh
<?xml version='1.0' encoding='utf-8'?>
<BeremizRoot xmlns:xsd="http://www.w3.org/2001/XMLSchema" URI_location="LOCAL://">
<TargetType/>
</BeremizRoot>