The use of binary for CURVE keys is painful; you cannot easily copy
these in e.g. email, or use them directly in source code. There are
various encoding possibilities. Base16 and Base64 are not optimal.
Ascii85 is not safe for source (it generates quotes and escapes).

So, I've designed a new Base85 encoding, Z85, which is safe to use
in code and elsewhere, and I've modified libzmq to use this where
it also uses binary keys (in get/setsockopt).

Very simply, if you use a 32-byte value, it's Base256 (binary),
and if you use a 40-byte value, it's Base85 (Z85).

I've put the Z85 codec into z85_codec.hpp, it's not elegant C++
but it is minimal and it works. Feel free to rewrap as a real class
if this annoys you.

Signed-off-by: Mikko Koppanen <mkoppanen@php.net>

Signed-off-by: Mikko Koppanen <mkoppanen@php.net>

Along with the devices, xmlParser which is no longer needed
is removed.
Signed-off-by: Martin Sustrik <sustrik@250bpm.com>

Add missing files needed for regenerating configure to the distribution;
add MAINTAINERS; improve maintainer-clean to produce a really clean tree.
Signed-off-by: Martin Lucina <mato@kotelna.sk>

* Added a version.sh and relevant changes to configure.in to extract the API
  version from zmq.h at the time autogen.sh is run.
* Moved the version macros to be next to zmq_version in zmq.h and improved
  the comments.
* Modified ZMQ_MAKE_VERSION to use (x) instead of plain x when expanding
  macro parameters.
Signed-off-by: Martin Lucina <mato@kotelna.sk>

Change 'make dist' to generate the Git ChangeLog file, that way it doesn't
have to be manually updated nor kept in Git which causes unnecessary work.

Also change 'make dist' to invoke 'dist-zip' automatically to generate a
ZIP as well as a .tar.gz.

Thanks to http://live.gnome.org/Git/ChangeLog for the inspiration to
automatically generate ChangeLog.

The test suite uses the standard automake support. Tests are always built,
but run only when you do a "make check".