entities.Container: added getport method
entities: added JsonFile class
utils.docker_lines: ignore errors while decoding strings from utf8
actions: added "restart" command
pep8 fix
refactored: modules paths prepared to migrate to namespace package
fix: entities.Image could not get id if there is multiple tags on the same id
refactoring: Yandex-specific functions moved to dominator.yandex package
version changed to 1.0
tests fixed
actions: removed unused import
Merge pull request #17 from nikicat/master

package paths refactored, yandex-specifics removed, bug fixes