LocalShip: added self-signed certificate generation
fixed invokation using `python3 -m dominator.actions`
`dominator shipment generate` can now list available obedients and obedient entrypoints
improve README.md (not all mentioned features are ready yet)
improved commands' docstrings
README.md: added Why Not? section
Merge pull request #51 from nikicat/master

README.md rewrite, various improvements
Update yandex related settings 'example'
Merge pull request #53 from shoonoise/master

Update yandex related settings 'example'
Fix bumpversion
Merge pull request #54 from shoonoise/master

Fix bumpversion
clarify if/else logic in Image.getfullrepository
more debug logging when generating Shipment
Container: override __getstate__ instead of __setstate__ to allow recursive save
port specifications replaced with Interfaces
refactoring: added refs to parent to all child objects
fixed --clear-cache handling
added "shipment objgraph" command that dump object graph
fixed tests
added "volumes" command group