Test programs

info
	Lists all backends, context, codecs and their respective options.
	If option -c/--check given, tests the option api. Use this to
	verify the API of new backends, contexts and codecs.

io
	Test the i/o modes supported by librte. The video and audio data
	sent to the codec is generated, no actual capture hardware needed.
	-x | --context keyword
			Use this context, lookup keywords with info tool.
	-d | --codec kwyword
			Use this codec, lookup keywords with info tool.
			You can give more than one codec, stream type is
			automatically determined and elementary stream
			number assigned in given order.
	-o | --output filename
			Write to filename, if not given to stdout.
	-s | --sleep sec
			Sleep this number of seconds (10) between
			rte_start() and rte_stop().
	-q | --queue n	Set buffer queue length for push methods,
			default minimum required by codec.
	--block		Push call shall block.
	--cm		Use callback-master i/o method.
	--cs		Use callback-slave i/o method.
	--pm		Use push-master i/o method.
	--ps		Use push-slave i/o method.

The ultimate test is http://zapping.sourceforge.net, the TV viewer this
library was written for.
