Update Magellan Documentation

[everett-f]

The Magellan Documentation for javascript options is out of date. This is the current documentation, http://foundation.zurb.com/docs/components/magellan.html#js.

This is what it should look like:

"magellan-expedition": {
    active_class: 'active',
      threshold: 0, // pixels from the top of the expedition for it to become fixes
      destination_threshold: 20, // pixels from the top of destination for it to be considered active
      throttle_delay: 30, // calculation throttling to increase framerate
      fixed_top: 0 // top distance in pixels assigend to the fixed element on scroll
}

This is the default configuration. I am using Foundation 5.2.3. I can now adjust magellan to account for the sticky nav. I hope this is helpful

[rafibomb]

done b83163e