'robes' should maybe be aliased to 'robe'

robes -> robe  
Maybe because I feel like there might be some kind of difference, but I dunno.

There is a difference, even if the use is a little all over the place.
 
robe would be almost more suited to be aliased with bathrobe, while robes would be more for full on getups. Of course there are still capes, wizard robes and other samurai costumes tagged under robe.
 
Might benefit from a cleanup before doing anything to these tags.