Home page: Rebuild card blocks on home page using Feature node type and view.

[jenlampton]

I would like the cards in the hero region to be a View of the "Feature" node type:

Wes already provided great markup and CSS to make this look fab, so I've built a view that generates almost exactly the same markup - It's is pretty close!

I'm having a little trouble getting the More link to look right, so going to turn it back over to him for further cleanup.

Chnges include:

• New config for a view named home-cards
• New views template views-view--home-cards.tpl.php
• Changes to the Home page layout config, to place the new block

Commits containing changes (since they were not sequential)

• 9ecdde9 - adds cards view and template
• e69ed78 - CSS change made the hero region background black, and applied more-link styles
• 03089fd - Rename the template file so that it will only affect the block display of the view
• 117151d2 - switched machine name for view (since we already had a view for this)

[jenlampton]

I switched the icons over to using the Icon API (and deleted the duplicate svg files from the theme) in a1b5ca4. I left the old class names in the CSS file so both displays will keep working with the core icons.

[jenlampton]

This was completed by @wesruv in #1089