Added NZB_CLIENTAGENT and TORRENT_CLIENTAGENT variables to compliment adding in Nzb client API support for SabNZBD and NzbGet.

Partially added in searching for downloads via download client API calls, more work to be done on this.

NZB Client users but set there client in the cfg, either sabnzbd or nzbget.

Cleaned up some more of the code in TorrentToMedia and nzbToMedia.