Split StateMachine and Tools into separate targets

This change is needed to share the functionality between
the core library and the SDK library. We want to support building/installing
just the SDK without having a dependency on the core library which adds
additional dependencies.

fairmq/sdk/runFairMQ.cxx

@@ -7,9 +7,12 @@
  ********************************************************************************/
 
 #include <fairmq/sdk/Topology.h>
+#include <fairmq/StateMachine.h>
+#include <iostream>
 
-int main(int argc, char *argv[])
+int main(int /*argc*/, char ** /*argv*/)
 {
-  
+  std::cout << fair::mq::State::Idle << std::endl;
+   
   return 0;
 }