Viewnior 1.5 was reseased. Please See http://siyanpanayotov.com/project/viewnior/news/ and https://github.com/xsisqox/Viewnior/blob/master/NEWS
1.6 is now current (as of 12-17). Also, homepage in ebuild should probably be updated to: https://github.com/xsisqox/Viewnior
Added to the tree.