Merge pull request #600 from rolandwalker/macos_release_casks

Enable new form `MacOS.release` in 2 Casks

Casks/jdownloader2.rb

@@ -2,7 +2,7 @@ cask :v1 => 'jdownloader2' do
   version :latest
   sha256 :no_check
 
-  if MacOS.version < :lion
+  if MacOS.release < :lion
     url 'http://installer.jdownloader.org/JD2SilentSetup_10_6orlower.dmg'
   else
     url 'http://installer.jdownloader.org/JD2SilentSetup.dmg'

Casks/paraview-nightly.rb

@@ -2,7 +2,7 @@ cask :v1 => 'paraview-nightly' do
   version :latest
   sha256 :no_check
 
-  if MacOS.version < :mavericks
+  if MacOS.release < :mavericks
     url 'http://www.paraview.org/paraview-downloads/download.php?submit=Download&version=nightly&type=binary&os=osx&downloadFile=ParaView-Darwin-64bit-Lion-Python27-NIGHTLY.dmg'
   else
     url 'http://www.paraview.org/paraview-downloads/download.php?submit=Download&version=nightly&type=binary&os=osx&downloadFile=ParaView-Darwin-64bit-NIGHTLY.dmg'