Parsing SingleFile datetime using dates.strpdate.
Adding timezone when no timezone info is available.
Installing python-dateutil to assist in handling diverse datetime strings.
Reworking refresh progress to use idempotency to display more accurate progress. Only logging that files have been invalidated if they used to be indexed.
Clearing archives to force re-index.
Ignoring 'Unknown' author from PDF metadata. Using file_title when pdf metadata title is empty.
* A new zim module has been added, this module allows several things to interact with Zim files.
* Allow searching of Zim files using libzim.
* Allow downloading of Kiwix projects (wikipedia, wikibooks, etc) on a schedule which replaces the outdated files.
* Creation of a new zim docker container which allows viewing of the Zim file contents.
* This commit also adds move/rename/mkdir features in the File Browser.
* File tags are preserved when moving/renaming.
