Remove CVS remnants, fix HG URLs/IDs, more/better use of subprocess module.
Remove CVS remnants, fix HG URLs/IDs, more/better use of subprocess module.

zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb