Close modal after deleting app

* Handle delete failure by showing an alert with `alert`
* Wait to remove model from the collection until the server responds
  with `wait: true`
Merge pull request #572 from mesosphere/close-modal-on-app-delete

Close modal after deleting app
Upgraded to mesos-utils 0.20.0
Merge pull request #573 from mesosphere/mesos-utils-upgrade

Upgraded to mesos-utils 0.20.0
Setting version to 0.7.0-RC1
Setting version to 0.7.0-SNAPSHOT
GroupManager: the plan should be stored after the deployment is accepted by the scheduler
Add Disqus to companies using Marathon

Profit.
Merge pull request #576 from fuziontech/patch-1

Add Disqus to companies using Marathon
Merge pull request #575 from mesosphere/group_fix

GroupManager: the plan should be stored after the deployment is accepted
More robust version detection in .travis.yml
Merge pull request #578 from mesosphere/travis-version-robustness

More robust version detection in .travis.yml
Added brief doc on high availability
Reference high availability page in running instructions.
Merge pull request #579 from mesosphere/add-ha-doc

Added brief doc on high availability
Compile JS in master
Re-style nav-tabs and adding links
snake case in stead of camel case in css
Re-writing togglable tabs component to also have
nav separated (which also moves ownership to user)
Use tabs to toggle panes