Completed internal renaming of XREP/XREQ to ROUTER/DEALER

Fixed issue LIBZMQ-345 - race condition in ctx.socket/term allows segfault

Ctx patches

Fixed issue LIBZMQ-344 - Implementation of ZMQ_FAIL_UNROUTABLE is broken

* corrects whitespace errors
* fixes spelling errors in comments
* prefers #ifdef to #if defined

Fixed issue LIBZMQ-343 - zmq_msg_get/set are too complex

* Return integer property
* Fixed up man pages, which were inaccurate
* Fixed test case

Applied patch for issue #293 - zmq 2.1 doesn't follow the ZMTP/1.0 spec

remove unused variable

fix connection establishment for AF_UNIX sockets

Wrote new ctx API, added ZMQ_MAX_SOCKETS and ZMQ_IO_THREADS

Disable reconnection option

Add value -1 to the ZMQ_RECONNECT_IVL to disable the reconnection algorithm

Removed sys:// logging infrastructure

Removed last vestiges of thread-safe sockets

* Implemented new ctx API (_new, _destroy, _get, _set)
* Removed 'typesafe' macros from zmq.h
* Added support for MAX_SOCKETS (was tied into change for #337)
* Created new man pages

Fixed issue LIBZMQ-333 (zmq_devices is missing)

 - reverted commit 941be8d2.
 - fixed zmq_device implementation for latest socket_base class
 - added back zmq_device.3 man page

An options to choose the behavior for unroutable messages in ZMQ_ROUTER sockets

Add WinCE support.

* Added two new files: errno.hpp and errno.cpp. They are required to use errno functionality on WM.
* zmq.cpp, msg.h: removed inclusion of errno.h because it is included in zmq.h that is also included by .cpp.
* windows.hpp: process.h is included only for desktop builds.
* thread.cpp: on CE CreateThread is used instead of __beginthreadex
* socket_base.cpp, clock.cpp: on CE include cmnintrin.h instead on intrin.h
* signaler.cpp: on Windows should use special macro around event name (for unicode builds)
* err.hpp: make it include errno.hpp (my file) instead on errno.h when building for CE
* err.cpp: use FormatMessage when building for CE (because CE does not have ANSI API functions)
* zmq.h: do not include errno.h whe building for CE
* libzmq.vcproj: add tro new files

Eliminate unnecessary line break