Switch to the minified JSZip.
fix #12708 by updating class names in the docs JS
avoid using .bs-* in example, & improve style
Use .bs-example-* instead of .bs-* in examples in docs

Refs #12610
Remove trailing space.
Merge pull request #12709 from twbs/bs-to-example-prefix

Use .bs-example-* instead of .bs-* in examples in docs
Fix multistr errors in customizer.js
Fix scrollspy typo in docs.css
Merge pull request #12711 from ZDroid/scrollspy-typo

Fix scrollspy typo in docs.css
Merge pull request #12710 from ZDroid/customize-multistr

Fix multistr errors in customizer.js
v3.1.1 bump
update homepage showcase with three new posts
grunt
grunt
Update less.js to v1.6.3.
Update dependencies.
Merge pull request #12718 from twbs/dependencies

Update dependencies.
Merge pull request #12719 from twbs/update-less

Update less.js to v1.6.3.
Add build-raw-files log; fixes #12603

Fixes #12672
bump grunt-exec to v0.4.5 & add missing tilde to version spec