Add LilyPond.app v2.19.52-1 (#2972)

Casks/lilypond-dev.rb

@@ -0,0 +1,19 @@
+cask 'lilypond-dev' do
+  version '2.19.52-1'
+  sha256 '099c7947b76452b187e07bfb459cac8e7aa276444e2315f9521f14bfefba8367'
+
+  # linuxaudio.org/lilypond was verified as official when first introduced to the cask
+  url "http://download.linuxaudio.org/lilypond/binaries/darwin-x86/lilypond-#{version}.darwin-x86.tar.bz2"
+  name 'LilyPond'
+  homepage 'http://lilypond.org/'
+
+  app 'LilyPond.app'
+  binary "#{appdir}/LilyPond.app/Contents/Resources/bin/lilypond"
+  binary "#{appdir}/LilyPond.app/Contents/Resources/bin/lilypond-book"
+  binary "#{appdir}/LilyPond.app/Contents/Resources/bin/convert-ly"
+
+  zap delete: [
+                '~/Library/Preferences/org.lilypond.lilypond.plist',
+                '~/Library/Preferences/org.lilypond.lilypond.LSSharedFileList.plist',
+              ]
+end