Move parser and command_line modules
The purpose of this MR is to move the pesummary.{core/gw}.parser
and pesummary.{core/gw}.command_line
modules into the pesummary.{core/gw}.cli
directory. This is a general tidy up and is related to #288.
The purpose of this MR is to move the pesummary.{core/gw}.parser
and pesummary.{core/gw}.command_line
modules into the pesummary.{core/gw}.cli
directory. This is a general tidy up and is related to #288.