Implemented PoC Subscriber mechanism.

Signed-off-by: Daniel (dmilith) Dettlaff <dmilith@verknowsys.com>
Made Publisher code bit cleaner.

Signed-off-by: Daniel (dmilith) Dettlaff <dmilith@verknowsys.com>
Ready PoC, polled, multithreaded (safe), implementation of publisher / subscriber mechanism. More in details.

* Defined default threads amount for polling to 8.
* Updated project definition.
* Removed a couple of hardcodes from code

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