Enable the banner / slideshow mechanism included with Make

Make includes a slider by default, using jQuery Cycle2 to manage
the slides on the front end. We can reuse a lot of this code with
some minor changes to the display on the front end.

This first commit sets things up pretty well. We can now edit the
front end template to display something a bit more custom
Start tracking our own front end display for the banner template
Customize the front end display of the banner template

Adds classes to match spine framework expectations
Use our expected HEADER H2 elements in the banner section title
Introduce Genericons as an icon font for basic iconography
Remove styles for the upstream slider shortcode not in use
Reduce size of slider circle indicators
Revert "Reduce size of slider circle indicators"

This reverts commit 817500f65e2bde39b7c464fbee1daa901e7f804f.
Only enqueue Cycle2 and Genericons on page builder template
Use banner specific post meta to enqueue slider script and style

If a page builder template is saved and has a banner section, a
meta value will be stored to flag Cycle and Genericons for enqueue
on the front end view.
Remove unminified Cycle2 Javascript

We don't need the full source in this repository right now.
Merge pull request #90 from washingtonstateuniversity/feature/sliders

[PR] Enable the banner / slideshow mechanism included with Make