New reports, record checks, media support, and usage bug fix

This release adds video files to the media types supported for DataCite updates, and introduces the ability to update Eprints records using the API (currently just for resolver updates).

It also includes are a lot of new reports, such as:
-People search from feeds.library.caltech.edu
-Records with alt_url field in Eprints repositories
-Creators in Eprints repositories
-Accessions in ArchivesSpace
-Discrepancies in resolver_url in Eprints repositories
-Search for groups in other fields in Eprints repositories

New checks:
-Ensure alternate identifiers are not repeated in CaltechDATA

Bug fixes:
-Switched to DOI prefix-filtered event data feed due to the now massive size of the unfiltered feed
-Fixed issue in usage reports where records with only downloads were showing up in incorrect months