Merge branch 'abravalheri-api/zmq_getsockopt' into dev
Merge branch 'abravalheri-api/zmq_setsockopt' into dev
Merge branch 'abravalheri-api/socket-operations' into dev
Fixed typos and minor stylistic problems.
Update docs.
Updated README
Added zmq_send.c, minor formatting changes in other files.
Merge branch 'api/messaging-basics' into dev

Conflicts:
	src/core/zmq_send.c

'dev' version prefered, but some changes were needed in order to pass
tests
Merge @abravalheri's commits, adding examples, basic messaging support and more tests.
Refactored zmq_recv to mimetize zmq_send structure