"Constructors" section:

  Display constructors' prototype methods in an unordered list instead of divs.

  Give all the checkboxes in the "Constructors" section clickable labels.

  Use JavaScript to:
    insert a toggle-all for a constructor's prototype methods,
    sync states for the toggle-all button and the method's checkboxes
    sync disabled-state between the constructor's checkbox and the methods' checkboxes.
Merge pull request #228 from npup/master

"All"-checkbox (and some more), issue #87