Documentation for application groups and deployments.
Reflect comments from ssorallen
Forget tasks after telling Mesos to kill them

- Fixes #461
Updating app on task fetch
Changing app list owner to be Marathon.jsx
Making Marathon.jsx owner of task and version list
Removing attempt to update view through callback
Adding forceUpdate on fetch result in Marathon.jsx
Reset to task and version list loading on modal
close
Handling re-paints using setProps
Removing unnecessary watches
Handling show details/task list correctly
Moving states to the Marathon Model
Stopping tasks from polling on unmount
Creating constants file
compiling sources
Review: code cleanup
Re-compiling sources
Gathering polls into one
compiling sources