Thanks to Matt Weinstein for the suggestion.

This reverts commit f575f252.

Conflicts:

	doc/zmq_device.txt

This reverts commit 6cd90304.

This reverts commit 77a3c36f.

This reverts commit c51de31f.

This reverts commit 6ff19399.

This reverts commit 13f3481e.

Conflicts:

	doc/zmq_device.txt
	doc/zmq_tcp.txt

This reverts commit 96bcc9e6.

This reverts commit de017375.

Add some basic documentation for XREQ/XREP socket types, including
a brief description of the most common use case (REQ -> XREP) and (XREQ ->
REP).

* Fixed zmq_term, zmq_socket, zmq_close, zmq_setsockopt,
* zmq_getsockopt, zmq_bind, zmq_connect, zmq_send,
* zmq_recv, zmq_poll, zmq_device, zmq_stopwatch_stop
* Updated Reference Manual for these methods

* Clarified broker model and proxy model
* Added example of proxy model

- fixed unwrapped text in new man pages
- fixed over-long lines in older pages, where possible
- removed reference to old standalong devices from index page
- added refernce to new zmq_device[3] documented from index page
- some minor spelling corrections

* Added documentation for zmq_deviced, which we're developing
* Created consistent page footer in documentation template
* Page footer notes doc authors and copyright statement

Document MORE bit in flags field

Mostly Flow control and additions to zmq_socket(3)
Removed/changed lots of text regarding message queues
More fixes for 2.0.7 changes

The option_value parameter for zmq_getsockopt is in and out.

Clarify multi-part messages

Clarify pipeline and exclusive pair patterns

Add getsockopt to Makefile.am