Icons! Finally, signifying type of link without relying on colours. Also
added some margin to help alleviate strain from contrasting colours.
Fixed background-color of "NAS" home link maintaining white background.
Expanded the README with more up-to-date data and elaboration on
providers, which may have been a bit unclear before. Also added a few
configuration examples for each provider, with comments.
Reworked the fileprovider to proxy data directly from the provider
rather than attempt to funkily redirect when needed, since it was overly
complex and wouldn't work well in the long run. Temporarily added "file"
as constant return for determining the filetype through Backblaze.
Added a Makefile to make life easier as well, and rewrote the README to
reflect the refactor/rewrite and new approach to providers.