Fabricio

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- Change: ``ImageBuildDockerTasks.prepare`` can now take any option each of which will be passed to ``docker build`` command
- Change: all options values are passed using '--option=value' template instead of '--option value'
- Change: ``docker.Service``: labels with current and backup options are encoded using base64 codec instead of raw JSON
- Fix: improved options quoting
- Fix: ``fabricio.local()`` can show command's output when ``capture`` param enabled
- Enhancement: ``StreamingReplicatedPostgresqlContainer``: added compatibility with PostgreSQL 10
- Enhancement: ``fabricio.local()`` and ``fabricio.run()`` have common set of params now
- Enhancement: ``DockerTasks``: ``tag`` param may contain full image name (e.g. ``registry/account/name:tag``)

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- Fix: ``AvailableVagrantHosts``: fixed vagrant hosts parsing on Windows

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- Fix: ``Service``: fixed failover during update
- Enhancement: ``DockerTasks``: use proxy registry when custom registry account used
- Enhancement: ``AvailableVagrantHosts``: added "+" and "+=" operators support

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- Fix: ``PostgresqlContainer``: fixed DB data 'volume' check
- Enhancement: ``AvailableVagrantHosts``: added slicing support
- Enhancement: ``DockerTasks``: added ability to override Docker registry account

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- Change: use Docker's default values for ``--stop-grace-period`` and ``--replicas`` options
- Enhancement: do not raise error if at least one Swarm manager was able to update the service
- Enhancement: added ``upgrade`` command

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- Fix: fixed ``Container``'s deprecated options mapping