Customizer: Alert on successful save to Gist
Update showSuccess to use new classes
Hopefully a fix for #12364

* register the callback before invoking the toggling
* listen for `hidden` instead of `hide`
* account for the possibility of the associated `show` event being preventDefault-ed

Adds relevant unit tests.
fix #13697

[skip sauce]
add missing role="menu" attrs to .dropdown-menu elements in docs+examples

Docs audit prompted by #13697.
[skip sauce]
Merge pull request #13700 from twbs/role-menu-all-the-things

add missing role="menu" attrs to .dropdown-menu elements in docs+examples
Changed broken #authors anchor to #creators
Merge pull request #13716 from rustinlee/fix-creators-anchor

Changed broken #authors anchor to #creators
bump grunt-contrib-qunit to ~0.5.1
bump grunt-contrib-jade to ~0.12.0
update shrinkwrap

[skip sauce] [skip validator]
Merge pull request #13731 from twbs/bump-deps

Bump dependency versions
bump grunt-saucelabs to ~8.0.2
update shrinkwrap

[skip validator]
Merge pull request #13732 from twbs/bump-sauce

Bump grunt-saucelabs to ~8.0.2
Added  directive for composer
Merge pull request #13740 from jasny/patch-composer-replace

Added rename directive for composer
Merge pull request #10632 from stuartpb/patch-1

Customizer: Alert on successful save to Gist
Tweak JSHint and JSCS checks.

Be more consistent across the whole codebase.

Also, make use of JSHint's 2.5.1 `extends` and `qunit` options. This way we set our basis options in js/.jshintrc and override the rest.
Comply to the new style.