Validate executor pattern

Pattern is taken from AppDefinition.scala.
Render modal in React based off state

* `AppListComponent` polling start/stop is entirely handled in
  `Marathon`. No longer need to do that in the AppList.
Remove unneeded jshint comments

The content below is no longer JSX; it’s plain old JavaScript.
Improve executor pattern msgs to be human readable

Humans don’t like reading regexs (particularly the human named Michael).
Correct capitalization of ZooKeeper in README
Compile JavaScript currently in master
Adding deployments to modal and app list
Conflicts:
	src/main/resources/assets/js/models/App.js
Removing update from app