Unified, cleaner, and improved Baggers and Locations pages

All the changes are in baggers.html and locations.html, hope you'll like them. You can see the result here:
http://janosgyerik.github.io/BrownBagLunch/baggers.html
http://janosgyerik.github.io/BrownBagLunch/locations.html

- Unified Foundation versions 3-4: use Foundation 4 in both
- Unified header and footer
- Pinned header to the top
- Added links to each other in the header
- Added "Baggers"/"Locations" in the page titles
- Removed colons ":" from Label elements

Note that using Foundation 4 has some unintended consequences: the fonts look bigger everywhere somehow. I hope that's ok...

If you like where this is going, let me know and I can do the same for past-bbl.html. I think it would be good to unify index.html too, but since it's not using Foundation at all (it's using bootstrap), the result will look quite different from the current page. So let me know how you want to deal with that.

Cheers,
Janos