CSDC Downloader per NOIRLab.edu

This extension will allow users to initiate downloads from the Astroarchive download page or by loading a previously saved manifest.json file.

The extension makes use of the browser's built in download management to download multiple files at once. Since some telescope/instruments generate fairly large files, this can take some time depending on the number of files being downloaded. This allows these files to be queued for download.