Add offline job type
condor_manager.py: Updates, bug fixes

- Offline job type is updated and debugged
- moved imports
- fixed a few typos
make_ini_file.py: Update configuration format
make_ep_channel_dag: Update with changes to ini format
ep_trigger_pipe: Initial commit

ep_trigger_pipe takes in a set of arguments required to generate a DAG
of offline (batch) gstlal_excesspower jobs for a given subsystem
ini_file
make_ep_channel_dag: add official deprecation