Add support for absolute pathing without domain

Handles URLs beginning with / in addToSABnzbd() so future protocol and
domain hardcoding can be avoided.
Use domainless pathing in nzbclub and nzbx
additional domainless changes (untested)

NOT TESTED. These address http v https and makes them more resiliant to
domain changes.
Revert "additional domainless changes (untested)"

This reverts commit ea766740d816a424115866e5486dd73247fcb6bb.
additional domainless changes (untested)

NOT TESTED. These address http v https and makes them more resiliant to
domain changes.

fixed my newline issue
pause duration

Implements pausing for N minutes. Adds dropdown for selection to pause.
Displays infinity or pause time remaining in place of download time up
top.

User may click pause to pause indefinitely, select a preset duration, or
selecting "other" will prompt for minutes to pause.
math is hard
Updating README

nzbx.co support was added not long ago
Changelog/manifest changes for recent changes (0.5.22)