[#issue-29] accept events and comamnds sockets information from ui
[#issue-29] add rbkit commands for start, stop, snapshot and gc-trigger commands
[#issue-29] add zmq abstractions for command and event sockets
[#issue-29] make sure that subscriber uses socket abstractions for starting and stopping profiling
[#issue-29] rbcommands should return QStrings instead of const char*
Merge pull request #36 from code-mancers/issue-29-start-and-stop-profiling

Issue 29 start and stop profiling
Merge branch 'master' into process-new-event-format

Conflicts:
	rbkit-lib/rbkit-lib.pro
	rbkit-lib/subscriber.cpp