Misc updates
Created by: emthompson-usgs
- Now using logging instead of print statements and the warnings library; logging level is now set via command line option (closes #7 (closed))
- Created a "shared" command line group of arguments to avoid duplicate code across the different command line programs
- Now use configobj rather than yml for config file (closes #20 (closed) and closes #19 (closed))
- Config has a spec file with defaults
- Config gets installed in .gmprocess with gmsetup program
- Renamed obspy package to gmobspy because of namespace conflict
- Moved package data into gmprocess/data directory and use pkg_resources library to access data