Bower: Ignore development and documentation files on bower.json. Fix #10313.

I've kept only the files I consider relevant to bower installation:

- Files in dist directory;
- Files in js directory;
- Files in less directory;
- bower.json file;
- README.md file;
- LICENSE file.
add responsive CSS to hyperlinked images when thumbnail caption markup is used

When thumbnail caption markup is used in combination with a hyperlinked image, the image is not responsive. (non-hyperlinked images are fine, like the example in the docs) Adding a selector to apply responsiveness to hyperlinked images when thumbnail captions are used.
bower.json: Modify `assets` directory on ignore to `docs-assets`
Fixes issue #11098 -- Button documentation.
added bower_components to .gitignore
Add quick fix to labels and badges in buttons
Support .h1 in place of h1 inside .jumbotron

As in #7284, it can often be useful to style text like a heading in
places where using the heading tag would be either semantically
incorrect, less accessible, or otherwise invalid.

Support this in .jumbotron as in the rest of the document by allowing
elements with class .h1 to stand in for the h1 element.

Signed-off-by: Kevin Locke <kevin@kevinlocke.name>
otherwise content scrolls on chrome

without change, body scrolls on chrome Version 30.0.1599.101 (OSX 10.9)
Serve jQuery from cookie-free Google APIs

jQuery.com uses Google Analytics and so sets a cookie when you visit
the site. When you request jquery.js from its CDN, code.jquery.com,
you take a hit from sending your previous GA cookie in the request.

Google Hosted Libraries[1] and googleapis.com never set cookies.

[1] https://developers.google.com/speed/libraries/devguide
Load Twitter widget async, prevent SPOF

Twitter's widget library[1] provides an async snippet to inject the
script tag later. Since widgets.js came before the local JS, if
twitter.com took long to respond it would prevent subsequent
synchronous script tags.

[1] https://dev.twitter.com/docs/tfw-javascript
Add protocol for jQuery to work when accessed as file

URLs without protocols get "file:" prepended when their document is
loaded as a file. Make sure the docs can always be opened by
specifying a protocol.
Add async attribute to Twitter widget script
add warning about WebKit bug to the justified nav example itself
Simplify table state styles
Don't print .clearfix() comment references
Fix glyphicon class name wrapping in IE
Add missing `.small` styles and docs
Corrected color contrast to WCAG 2.0 AA
Better documentation for validation states
add release checklist to CONTRIBUTING file; fixes #11290