Refactoring: replaced unnecessary constants zoo.*_LOCK to single zoo.LOCK
Implemented incremental counter for numbering jobs
bmod_storage: storage.set() takes an argument "version"
bmod_state: state.add_previous() uses a version of the event at saving
refactoring: removed _dict/_list suffixes from raava.zoo
test-flow refactoring: more common echo_event() function, server class
gns.service: quiet mode for tests
Hack to pickle dynamic created comparators
bmod_storage: Implemented CAS, saving value for increasing versions of the data.
test_flow: added comment about the stub event
bmod_state: fixed version error logging
zoo.init(): Added comment about Lock() and LockingQueue()
bmod_storage: simplfied msg formatting
test_flow: provided url in event to avoid host/port duplication
Separate configurations for tests instead of --quiet option
run-tests: init logging from gns-test.d configs
raava.zoo: Added comment with ZooKeeper nodes scheme
bmod_storage: fixed _logger.exception() in _set_value()
test_flow: Accelerated test execution from 30s to 12.5s
Merge pull request #38 from mdevaev/events-counter-2

Incremental counter for jobs