First release

This version of the module appears to work, so I have made a first release. See file README for compilation instructions and example uses. My test case was a budget dvb-t usb card (af901x): I managed to watch four channels by selecting pid=0x2000, redirecting /dev/dvb/adapter0/dvr0 to /dev/example0 and then running an instance of mplayer for each channel. Mplayer sometimes crashes by "bad usage of memory/cpu", especially when quitting it; not sure what the problem is, but it may have to do with memory, as these crashes are rarer when using a file as a circular buffer.