add tool to list contents of an ALMA Cycle 0 tarfile.  TBD: Cycle 1
clear out some bugs, but the cycle0 table is fully non-self-consistent
fix staging, cycle 0 parsing, and data size acquisition
add tool to extract files from tarballs based on regex
add tool to download all FITS files from a set of URLs
minor fixes and doc updates
rename download_FITS_files to download_and_extract_files and change docs
accordingly
docs and docstring improvements
starting to add test
add stashed changes
local tests for staging - exceedingly complicated, but that's how it
goes
add fix for non-unique urls
add test data
add a setup_package for ALMA data (needed for the cycle0 table)
python 3 compatibility.
slightly increase verbosity of changelog entry
Merge pull request #433 from keflavich/alma/cycle0_contents

ALMA: Add new retrieval features, especially Cycle 0