Move boom to versions, fix failure to launch, add version and hash

Casks/boom1.rb

@@ -0,0 +1,15 @@
+cask :v1 => 'boom1' do
+  version '1.1'
+  sha256 'fe0edcb5e0c147b948dcab0d00bb042bfa2ecb32dda7f64c2aac90785585b676'
+
+  url "http://www.globaldelight.com/boom/download/#{version}x/boom.dmg"
+  homepage 'http://www.globaldelight.com/boom/'
+  license :commercial
+
+  app 'Boom.app'
+  
+  postflight do
+    # Delete the background image so that it will launch
+    system '/bin/rm', '--', "#{staged_path}/.DMG_Background_new.png"
+  end
+end