Added Scala IDE 3.0.2

New formula for Scala IDE. Output of 'cask audit':

<pre>
$ brew cask audit scala-ide --download
==> Downloading http://downloads.typesafe.com/scalaide-pack/3.0.2.vfinal-210-20131028/scala-SDK-3.0.2-vfinal-2.10-macosx.cocoa.x86_64.zip
Already downloaded: /Library/Caches/Homebrew/scala-ide-3.0.2.zip
audit for scala-ide: passed
</pre>