Distribution model refactor part II. More in details.

* Included part of nzmqt library (by Johann Duscher (a.k.a. Jonny Dee)) into dispel code base.
* Refactored namespaces, renamed SampleBase (wtf?) to AbstractZmqBase.
* Merged C++ header for Zmq
* Improved README (moved to markdown)
* Removed old/misleading info from README.

Signed-off-by: Daniel (dmilith) Dettlaff <dmilith@verknowsys.com>
Implemented PoC Subscriber using new API. More in details.

* Implemented first part of upcoming inter communication model API - Publisher.
* Simplified nzmqt implementation
* Implemented zmqVersion() helper.
* Merged dispel.pro with fragments of nzmqt.pro
* Old code cleanup

Signed-off-by: Daniel (dmilith) Dettlaff <dmilith@verknowsys.com>