New assets for UK content.
New video iframe
New content
Merge pull request #627 from code-dot-org/uk-content-changes

Uk content changes
Automatically built.

commit 3a057b195b37f6e5a667a423a0ffb2750d30fd36
Merge: 6345b54 e52eb7b
Author: Laurel <laurel.fan@gmail.com>
Date:   Tue Dec 2 16:59:27 2014 -0800

    Merge pull request #591 from code-dot-org/cache-images

    cache gallery and share images

commit 6345b549ea60b2da00b8c40fb5f49434224eadc7
Merge: 43917a8 874b443
Author: Bjvanminnen <Bjvanminnen@gmail.com>
Date:   Tue Dec 2 16:43:05 2014 -0800

    Merge pull request #621 from code-dot-org/playlabFix

    Playlab fix

commit 874b44367a853310bb02a952d9123623fc30adff
Author: Brent Van Minnen <bjvanminnen@gmail.com>
Date:   Tue Dec 2 16:38:28 2014 -0800

    fix for level 8

commit 43917a8313455d8178af21618799dd0d9bbe04ef
Author: Josh Lory <josh.lory@code.org>
Date:   Tue Dec 2 16:34:20 2014 -0800

    Fix 'string' type required blocks tests
change/add some timeouts
Merge pull request #628 from code-dot-org/playlabFix

change/add some timeouts
add a couple more toolbox blocks
Add white borders to course 4 banner.
Merge pull request #629 from code-dot-org/staging

DTT