Handle post-processing from nzbToMedia

Assumes that if there are three arguments and the third is numeric that
ComicRN.py has been called from nzbToMedia.
(thanks to clinton-hall for spotting my mistake wint len(sys.argv)
Merge branch 'development' of https://github.com/TheLabRatt/mylar into development

Conflicts:
	sabnzbd/ComicRN.py