stopwatch with d3-component | es2015

an es2015 iteration on the block Stopwatch from @currankelleher

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A stopwatch app constructed using d3-component.

The following components are defined and used to construct the app:

• app
  The top-level app component. This serves as a "container component" that holds the state of the app, and exposes "actions" to children (similar pattern to Redux. This component manages an instance of d3-timer that keeps track of passing time.
  
  
• buttonPanel
  The panel that contains the two buttons. This shows a simple composition pattern in which props are passed through to child components.
  
  
• resetButton
  The button that says "Reset" and invokes the reset action when clicked.
  
  
• startStopButton
  The button that either starts or stops (pauses) the stopwatch when clicked, depending on whether the stopwatch is running or not.
  
  
• button
  A generic Button component, used by both resetButton and startStopButton.
  
  
• timeDisplay
  A display of the current time.

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forked from curran's block: Posts with d3-component