Fix bug 861274 - video pillarboxing

Adjust the video height to maintain 16:9 aspect ratio. Some other aspect ratios will still get boxed, but this should cover most entries.
Fixes for vidly embeds.
added 2 promos for april 22

pull request tweaks

removed repetitive alt text
Some spacing adjustments for promo slides
added empty alt-attribute
Merge pull request #197 from icaaq/empty-alt

added empty alt-attribute
Fix bug 847609 - Partners page

added links
Merge branch 'bug-847609-partners-page'
Bug 847623 - winners page, round one
Merge pull request #196 from craigcook/bug-847623-awards-page

Bug 847623 - winners page, round one
Partners updates

* Added TechSmith
* Added hrs between sections
* Added footer logos
* Removed partner links in footer
Cosmetic updates to winners page

* Wrapped a box around the winners gallery
* Tightened up typography in the sidebar
Merge remote-tracking branch 'craigcook/bug-847623-awards-page'
Updates to partners and winners pages

Partners:
* Enlarged TechSmith logo, they're now a major partner
* Added 'major partners' section heading
* Shrank section headings and made them gray to distinguish them better from logos
* Removed Vimeo from footer
* Added TechSmith to footer

Winners:
* New section title
* New sidebar copy, focusing on deadlines instead of announcements
Corrected early entry award headline