Simplify config directory

• Move list of DARM notches into the config files.
• Move DARM calibration files to top level directory.
• Move PEM calibration file to top level directory.
• Consolidate channel lists across injection types? It will come down searching for relevant channels vs. searching for relevant channel list.
• Consolidate channel list and calibration file? Likely to break consistency with pem.ligo.org database, but it would help by parsing channels and calibration factors at the same time.
• Consolidate config files across injection types? Have to think about whether to consolidate options like local_max_width or to somehow keep separate between injections.
• Replace injection types mag and vib with ramp, broadband, etc.