Merge pull request #201 from benjamg/develop

4.2.0 requirements

Merge pull request #122 from xaqq/doxygen

Documentation improvement + switch to 4.1.2

update makefile version number a well

rework of client to default to a more pipe friendly format, also fixes …

…#22 (well improves rather than fixes really)

added disconnect and unbind, I should add tests for these as well

Merge pull request #16 from benjamg/feature/version3x

Feature/version3x

updated makefile and ignore for version 2.2.1, mostly bug fixes and t…

…he addition of streaming for the client over 2.2.0

Added ability to remove sockets from pollers, no idea how I missed th…

…is before

Version 2.1.0:

 - Support for 2.2, 3.1 and 3.2 (tested against tagged builds on github)
 - Added option for ipv4 for 3.1 and later
 - Added version built against check to stop people going crazy

v2.0.0:

Support for 0mq 3.1.0
Added new socket option (ipv4_only)

Building against version 3.0.x will enable the recv_label experimental code options, and against 3.1.x disables that and enables the new socket option instead.

Builds with the new option also have another overload of the socket::set function that takes a boolean type value.