Cabal revisions of Euterpea-2.0.5

Hackage metadata revisions edit the .cabal file after upload; each diff below is one revision.

 name:           Euterpea
 version:        2.0.5
+x-revision: 1
 Cabal-Version:  >= 1.8
 license:        BSD3
 license-file:	License
 copyright:      Copyright (c) 2008-2017 Euterpea authors
-category:       Sound
+category:       Sound, Music
 stability:      experimental
 build-type:     Custom
 author:         Paul Hudak <paul.hudak@yale.edu>,