Version 0.9.0

The big change for this release is context support used for REQ/REP to SURVEYOR/RESPONDENT. With this change, there is very little reason for raw sockets to be used, except in creation of devices and obscure test and debug scenarios.

A few bugs, some serious, have been fixed -- most notably a serious regression in REQ/REP caused by the original context work -- this turned out to have sweeping ramifications, and small changes were made across the code base to resolve the key issue (which was the need to separate nni_aio_start into two separate functions, which are now nni_aio_begin and nni_aio_schedule. Note that these two functions are for internal use only.)

Additionally, the compatible API is now documented.

At this point we consider nng "feature complete" for a 1.0 release; we will be focusing on performance, bugs, test cases, and demonstration code for the rest of the lead-up to 1.0. (We do have post-1.0 features planned, of course!)

Note that there are still some edge case features missing from nng which are present in nanomsg -- statistics, pipe priorities, certain socket options (TCP_NODELAY for example), and security attributes (named pipes on Windows only). We may still add support for some of these missing things before 1.0 depending on risk assessment. Otherwise we will do them in the following release. (If any of these features are a stopper for you, and you are using them with nanomsg, please let us know!)