Add startup week poster to main page.
Add announcements bar.

Freia suggested adding an announcements bar a la the awesome
lexilewtan.com website. Still more work to be done, but looking a lot
better.
Linkify SW poster to nyusw.com
Style fixes
Merge pull request #1 from ethanresnick/add-sw-link-to-main-page

Style fixes
Remove left (overriden by other rules)
Merge branch 'add-sw-link-to-main-page' of https://github.com/rgardner/tech-nyu-site into rgardner-add-sw-link-to-main-page

Conflicts:
	src/views/home.tmpl