Assert raise-error-check fix
Another pack of tests have been added
More verbosity while testing with mocks

 - removed deadline timeouts from tests
Old chain API replaced by new once

 - `ChainFactory` is now called just `Chain`
 - changed default behaviour `ServiceMock` class when no chunks provided - there will be only ChokeEvent emitted
 - log will be flushed on mocks assertion
 - another pack of tests have been written to check more yield-based usage of chain API
 - cocaine-tools cli module now can configure logging verbosity
Future class now explicitly send ChokeEvent exception

 - fixed situation when `Future.close()` is called earlier than `Future.bind()`
Second part of cocaine-tools (profile, runlist and crashlogs) now properly works with updated chain API
Cocaine-tools console applications now can be executed in debug mode

 - that means, all loggers will be activated
 - also code cleanup done
Code cleanup

 - only docstrings and threaded future remains from `oldchain.py` module