Change plugin to point to consolidated UnRAID plugin repo.
Version Bump to ensure user receives update, once updated they will no longer be pointing to old nzbget repo.
Huge update to the way the plugin handles nzbget app upgrades, especially when switching from stable to testing branch.  Due to the underlying changes to config files between stable and testing nzbget branches, had to rewrite portions of the install and upgrade plugin code to make it more robust.  Now when a user updates and new nzbget config entries exist or old ones are depreciated, it should be sufficient to update nzbget, enter the application webgui, go to settings, save and have all relevent new and old settings updated correctly by nzbget.  The plugin also saves a safety copy of nzbget.conf to plugins dir - just in case (and to keep Neilt0 happy).