Create fetchUtils.py

new routine to fetch remote and local routines, uncompress files
Minor documentation changes. Generalizing remote fetching routine for general remotedirfmt and fnamefmt.
Minor changes. Also removed the part of the code that determines the start time of the first file in the list of downloaded files.
Changed cycle_inc to more intuitive time_inc in fetch_remote_files.
Changed tempdir to outdir.
Working on fixing up the fetch_local_files method.
Cleaning up the code and documentation.
Optimized both the local and remote fetching routines.
Merge pull request #41 from vtsuperdarn/feature_FetchUtils

Merge feature_FetchUtils branch into develop