Started the cluster manager app.
Started manager class
added extra files
added  first tests
still need to finish cmanager design
started using pyzmq devices
Merge branch 'master' into feature/cluster_manager
finished first version of streamer;
extended pypln.test.conf
Streamer startting ok. tested.
moved monitoring ports to manager as streamer needs to be stricly a pipe device
started the slavedriver class. Need fabric to be started.
improved manager and testing code. but code still broken
minor change
tests passing but incomplete
improved tests
added testing package under utils with testing utilities for zmq
refactored-moved the apps package inside main PyPLN package
refactored-moved testing package inside pypln main package
integrated zmq testing tools into test_cmanager
tests passing on request reply