Don't explicitly reference global jQuery

Removes `window.jQuery` in favor of `jQuery`, fixes #10038
Add -moz-osx-font-smoothing
add warning about Respond.js not supporting @import; fixes #11143
Merge pull request #11258 from ZDroid/smoothing

Add -moz-osx-font-smoothing
Fixes #10516: Use auto positioning for dropdowns in justified nav to fix Firefox rendering
use regular text, not callouts
Fixes #10341: don't change border color on contextual table classes
edit
Merge branch 'respondjs-import-note'
restore IDs
run grunt
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