Initial Newsroom templating

I created a newsroom view in `lookups.json` which just pulls blog content for now so we can test.

For the sidebar nav I used a lot of work (styles and Sheer templating) from @ascott1 and @contolini, thanks!

@scotchester, we can leave this open until it gets a little further along.
Is anything about this different than the blog filters include? Should we combine them?