Node info action review.

 * node info action has been refactored due to absence of node.info() method.
Deprecated warning fix
Merge branch 'master' of github.com:cocaine/cocaine-framework-python
Disconnect locator if any errors occurred while service connecting.
Deprecated warning fix again
Log verbosity has been reduced
Servicename, code and reason members are back in ServiceError
Merge branch 'master' into v0.10
Version bump