Add ContainerInfo and DockerInfo support for deploy objects

Fixes #204
Add support for Mesos TaskInfo 'arguments' field
Documentation for containers!
Documentation for 'arguments'
Add tests!
Merge pull request #220 from stevenschlansker/docker-container

Add ContainerInfo and DockerInfo support for deploy objects
Fix link to dev docs
Added error message for 0 status
email changes

- make email destinations more configurable
- remove crappy SMTP logging appender
- cleanup email code / templates
Merge branch 'email_configuration' into hs_staging