Flint 1.0.0 Release Candidate 5

Update dependencies
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- [x] Get latest `bootstrap.css` and `bootstrap.min.css`
 - Substitute `"Helvetica Neue", Helvetica, Arial, sans-serif;` with `"Open Sans", sans-serif;`
 - Add `font-weight: 300;` to global font definitions
 - Change font weight of `h1` - `h6` from `500` to `600`
- [x] Get latest `bootstrap.js` and `bootstrap.min.js`
- [x] Check for latest Font Awesome version

Bugs
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- [x] Update post formats to be accurate
- [x] Update `.badge` to `.label` to preserve colors
- [x] Correct Theme tags in description
- [x] Update `flint_posted_on` for better display
- [x] Fix `<video>` to have a `max-width` of `100%`

Misc
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- [x] Simplify titles on archive pages
- [x] Change default header image to white
- [x] Remove pink from style.css
- [x] Add post format gallery template
- [x] Add space between articles and remove `<hr>` between articles
- [x] Simplify `steel_open` code in `header.php`
- [x] Remove `Author URI`; needs to be "personal in nature"
- [x] Add copyright notices to `README.md` for Bootstrap, Font Awesome and _s
- [x] Update `screenshot.png` to reflect "de-pinking" and upgrade to Bootstrap 3 RC2
- [x] Remove `flint-admin.css`
- [x] Clean up spacing in code