Added necessary requirement to parse socket uri instead of failing in verify_dependencies method.
Merge pull request #55 from madhatter/fix_uri_parsing

Added necessary requirement to parse socket uri
patch level bump, ensure uri has been required
Make tty and interactive configurable as driver options
Allow %{instance_name} substitution in bound volumes

This allows you to do clever things, like redirect a directory inside
the container to an outside logs directory named after the instance.