nearly done with massive restructure
cleanup of restructure
added stuff including outsourcing downloader
update to the instrument setup duplicate checker
including collections
big restructure to get standard stars working.
adding standard stars to the database
working on standard fields
Merge remote-tracking branch 'upstream/master' into gmos/imaging/redo_readin

Conflicts:
	geminiutil/gmos/alchemy/base.py
Merge pull request #71 from wkerzendorf/gmos/imaging/redo_readin

This PR is a restructure and moving of the download functionality to `util`