Update README.md to include OSMC
Update README.md to include OSMC

We are using Mirrorbits in production since 22nd January 2016.
Myself5/mirrorbits,Myself5/mirrorbits,wsnipex/mirrorbits,wsnipex/mirrorbits,etix/mirrorbits,wsnipex/mirrorbits,kib/mirrorbits,Myself5/mirrorbits,etix/mirrorbits,kib/mirrorbits,kib/mirrorbits,etix/mirrorbits