Add CSS to support band_imagery example at full width.
Improve shown figure selection by skipping CSS engine.

Also remove unused var.
Merge pull request #588 from saltybeagle/band-imagery
Refactor band-imagery plugin for extensibility

Change of class names:
* .wdn-scroll-watch is used on all elements which have scrolling effects
* .wdn-scroll-watch.flipbook.lerp for flipbooks
* .wdn-scroll-watch.locked for locked regions
* .wdn-scroll-watch.flipbook.locked.lerp for a locked flipbook

This will allow us to add new transition features like:
* .wdn-scroll-watch.lerp.scale inerpolate the scale of a figure
* .wdn-scroll-watch.lerp.rorate inerpolate the rotation of a figure
etc
Merge branch 'develop' of github.com:unl/wdntemplates into band-imagery

Conflicts:
	wdn/templates_4.0/scripts/band_imagery.js