document S3 cache more fully; fixes #12289
docs: use relative URLs instead of site.baseurl
fix #12298
Update grunt-contrib-uglify dependency.
Corrected tag for Alert JS animation example from <a> to <button>

Also removed href attribute and added type="button"
Merge pull request #12307 from twbs/bye-site-baseurl

docs: use relative URLs instead of site.baseurl
Merge pull request #12303 from twbs/doc-s3

document S3 cache more fully
fix #12314
fix #12311
fix markup typo, duh
upgrade #callout-navbar-overflow from info to warning
nitpick phrasing
slap a lang attr on <html> in the Getting Started basic template

for consistency with docs/examples/starter-template/index.html
clarify Grunt task licensing
Merge pull request #12317 from twbs/grunt-task-license

clarify Grunt task licensing
Merge pull request #12282 from XhmikosR/grunt-contrib-uglify

Update grunt-contrib-uglify dependency.
fix #12280 by templating the customizer's nav sidebar too

The customizer is such a PITA.
Merge pull request #12318 from twbs/fscking-customizer

Template the customizer's nav sidebar too
spacing
Merge branch 'master' of github.com:twbs/bootstrap