new formula: minidlna

[MiniDLNA](http://sourceforge.net/projects/minidlna/) (a.k.a ReadyMedia), developed by a [NETGEAR](http://www.netgear.com/) employee for the [ReadyNAS](http://www.readynas.com/) product line, is a very efficient [DLNA](http://www.dlna.org/) server. On my Mac, it usually uses 3 MiB of RAM to serve media unlike other solutions, which can use hundreds of MiB of RAM.