Part of tests are refactored

Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
TCP mapping RFC improved

Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
changed location of the repo reflected in README

Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
reference to nanocat added to nanomsg(7)

Signed-off-by: Martin Sustrik <sustrik@250bpm.com>