Remove few warnings

Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
autotools: Initial autotools build system

Ease the life of those that need to cross compile

Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
NN_IPV4ONLY option added

Signed-off-by: Martin Sustrik <sustrik@250bpm.com>
autotools: add zmq compat as option

Provide a compatible pc file as well.
autotools: Generate documentation
tests: Use non colliding paths

Make running tests in parallel possible.
autotools: Update dolt

Support DISTCLEANFILES better.
autotools: Fix distcheck

The release tarball now contains everything needed to rebuild itself,
including the documenation.