Use boost shared libs when we are being built shared.

Change-Id: I8033d4a2b54869fd72d0de84c92286476bf52e08
Expose the build shared option to the user.

Change-Id: I30d54ee92618ba3508d36cc6c368adb773d7cd8e
Support zmq4.

Change-Id: I727f4b6ab7e0e28630fd67c6987c3f1b46823f79
Support build remus with examples and testing disabled.

Change-Id: I519d3468e9d8fc0d9ed8504f7f9521190cd70839
Merge branch 'support_shared_builds'

Change-Id: I8d66e350e76e960fca287fed44ac119d3a882675