Don't explicitly reference global jQuery

Removes `window.jQuery` in favor of `jQuery`, fixes #10038
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.
bower.json: Modify `assets` directory on ignore to `docs-assets`
added bower_components to .gitignore
remove unused `{{ page.base_url }}` variables, and fix the urls
JS comments pointed to new documentation
Merge pull request #11275 from jared-christensen/master

JS comments pointed to new documentation
Change tense to imperative

Matches this comment with the commit messages and other comments.
Merge pull request #11278 from ZDroid/patch-1

Change tense to imperative
Combine multiple .thumbnail > img styles
Merge pull request #11282 from ZDroid/combination

Combine multiple .thumbnail > img styles
Merge pull request #11274 from wangsai/fix-examples-urls

remove unused `{{ page.base_url }}` variables, and fix the urls
more grunt
3.0.1
Added navigation role to example navbars

As per the docs:
http://getbootstrap.com/components/#navbar-default

  modified:   examples/carousel/index.html
  modified:   examples/jumbotron/index.html
  modified:   examples/navbar-fixed-top/index.html
  modified:   examples/navbar-static-top/index.html
  modified:   examples/navbar/index.html
  modified:   examples/non-responsive/index.html
  modified:   examples/starter-template/index.html
  modified:   examples/sticky-footer-navbar/index.html
  modified:   examples/theme/index.html
Merge pull request #11315 from AJAlabs/master

Added navigation role to example navbars
Update README.md

Row 13 link update to tag v3.0.1
Merge pull request #11324 from boki-/patch-1

Update README.md
Use nesting for thumbnail styles
Update customizer.js