Cleanups and fixes for the standalone_edc
- fix the systemd unit to use the corect argument for the listen interface 'l' instead of 'I'
- convert the standalone_edc to use the args library, and update the documentation
- add a '_daq' to the end of the edc's mbuf name, so that it is similar to the models
- Note this is transparent to the user, the '_daq' should not be added on (either to the name passed into the edc or to local_dc)
- Updated the edc test to not specify '_daq' anywhere.
Closes #135 (closed)