CYB-321 - Provide UI support for generic URL submission

https://jira.ets.berkeley.edu/jira/browse/CYB-321

Building on top of https://github.com/ets-berkeley-edu/datacultures/pull/222

- Added UI support for generic URL assignment submission
- Added a default thumbnail for assignment submissions without a thumbnail

Note that the default thumbnail would ideally not be an image, but an HTML/CSS/FontAwesome only thumbnail. However, as this requires a structural HTML change, I've opted to go for an image approach to ensure that no regressions are introduced at this point.
That presentation is simply the best. Thanks for sharing it!



On Mon, Dec 15, 2014 at 12:52 PM, Christian Vuerings <
notifications@github.com> wrote:
>
> In app/assets/templates/gallery_item.html
> <https://github.com/ets-berkeley-edu/datacultures/pull/223#discussion-diff-21855687>
> :
>
> > @@ -10,6 +10,12 @@
> >      <div ng-if="item.type === 'video'" class="dc-videowrapper">
>
> @nicolaasmatthijs <https://github.com/nicolaasmatthijs> use Illustrator
> instead - you can install it on https://software.berkeley.edu/adobe. Also
> make sure you click on "export to outline" when you save the SVG file.
>
> These are the export options we usually use:
>
> https://docs.google.com/presentation/d/1CNQLbqC0krocy_fZrM5fZ-YmQ2JgEADRh3qR6RbOOGk/edit#slide=id.g2762eebf0_210
>
> Definitely let me know if you have any more questions.
>
> —
> Reply to this email directly or view it on GitHub
> <https://github.com/ets-berkeley-edu/datacultures/pull/223/files#r21855687>
> .
>