fixes #857 - add Silverlight and Google Gears detection; revert #744 & #683, restoring Java and Quicktime detection given #852.  Kept "Cookie".  AIR not detectable.


git-svn-id: http://dev.piwik.org/svn/trunk@1313 59fd770c-687e-43c8-a1e3-f5a4ff64c105