scrollfix and deep-linking fragment URIs in static pages

Closes #95 for Bootstrap 3.

- [x] Pricing page
- [x] FAQ
- [x] Jobs
- [x] Can link to individual questions/sections

Other fixes:

- moved `.breadcrumb` inside the `.container` to keep the horizontal alignment
- switched from `nav-tabs nav-stacked` to `nav-pills nav-stacked` ([`nav-tabs` shouldn't be stacked](http://getbootstrap.com/components/#nav-pills))
- side menu stays visible in the viewport (when width >= 768px) as requested [here](https://github.com/bountysource/frontend/issues/95#issuecomment-24775678)

Linking to individual sections is supported:

- https://www.bountysource.com/faq#bounties
- https://www.bountysource.com/faq#what-does-it-cost-to-post-a-bounty
- https://www.bountysource.com/fees#bounty-fees
- https://www.bountysource.com/fees#placing-a-bounty