Footer, header, the entire thing?

- Moved window resize code into app.dart.
- core-header-panel's waterfall-tall works correctly with the header again.
- We have an actual footer now! Right now it has IRC contact information, as well as a link to our Github organization and GitLab server. Sticky-ness is still awful buggy. I have the same problem as this person. http://stackoverflow.com/questions/27279273/core-header-panel-and-sticky-footer
- Clean up assorted markup.