This implements a URL List download at the base of the project files. It checks various http header information (if it's a fits, a gzip, the uncompressed md5) with the actual downloaded file and the database.
There are the beginnings of a restructure in this PR - it will not change any of the GMOS MOS parts, but make sure that GMOS imaging can reuse the MOS parts that are similar.
@mhvk your thoughts?
added extraction into slices again
adding download support to the base package. This also includes restr…
…ucturing of the whole package on a small level. Should not touch the currently existing pieces.
finished base download
finished downloading script - starting restructure for imaging