Latest Camera-Raw has support for it: http://blogs.adobe.com/lightroomjournal/
I suppose you will need to wait for LR6. I believe that there will be no new version of LR5 to support the latest Camera-Raw.
You could use the free Adobe DNG converter to convert the Proprietary raws to the universal DNG raw format. You could use Adobe's free DNG converter to convert proprietary raws to the universal DNG raw format. Here are the links: