Fixed some errors in the documentation

BS3 commits: 3b75d647677fec5852e07e6444ea77edb056e843
Added the removal of tab-content and tab-pane in the migration guide

BS3 commits: 7b06538c911f40c46ae67b0c0df7afdfbcb5d00a
Minify docs-assets too.

BS3 commits: dc34c8a206cbbe7a7fbac9d56fc1683c394a5b3b
track customize.js so that customizer works on GitHub Pages site

BS3 commits: 01a1c41d496ef2f339ea260a009f98bb02d88249
grunt

BS3 commits: 2e9cde6fd9d8804de47bcf901cfbc2211213d4ba
Drop browserstack.json from bower.json ignore

BS3 commits: 650279f70388acb366f560fdcb03b048ec1dc318
Be consistent with function () spaces

BS3 commits: 4be126e0142556805b59cb5a62d33c4a3fd2b8d4
fix some JS to pass jscs

BS3 commits: 351f86e1db6bbb5f37e67323094fc08f4aeceecd
need customize.js to be tracked for it to work on GitHub Pages

BS3 commits: c545312bd677c06025dfffb0d927e782c48d18e8
Load minified Bootstrap JS code

BS3 commits: 4b84acb9a4a441786766c588bc5455eeaf90e334
Darken navbar toggle icon bar to meet WCAG

BS3 commits: 94a5413ec7fb90c1340f1243869274c36d308cb0
Fixes 11764: Add meta data to docs for description, keywords, and authors

BS3 commits: 775c29fef6d87dd91ebc6dba5980f3b59976b435
grunt dist

BS3 commits: 2b4fa90902e9b911dafe76a7cd33f5bcb748a238
Fixes 11766: Use color var for background on badges in buttons to restore proper background to default button badge

BS3 commits: 107b334d349be065421967553f57aa186736ffcf
Reorder button and table variants for consistent order

BS3 commits: c07632e4e8398f55d796d00b520ca43df38dbf29
Fixes 10884: Adds .info variant to contextual table classes

BS3 commits: fe58357df182b52f5905f432a3b2629c717656f1
Fixes 11193: Add kbd element styles to indicate user input via keyboard

BS3 commits: b1215d1b2ecd6cd3898af19ce43cc647e2ec854a
Reorder button and table variants for consistent order. Fixes 10884: Adds .info variant to contextual table classes. grunt dist after adding .text-justify. Fixes 11193: Add kbd element styles to indicate user input via keyboard

BS3 commits: c07632e4e8398f55d796d00b520ca43df38dbf29,
fe58357df182b52f5905f432a3b2629c717656f1,
a1f737b43632f4615d54ec993dc645f858e3ca8d, Fixes 11193: Add kbd element
styles to indicate user input via keyboard
Contextual list group cleanup

BS3 commits: 07de53c644b315852c5f315ab91bfd6d65660d50
Fixes 11756: Mention document mode checking ability in IE comaptibility modes

BS3 commits: 9edec7ed2193b0ffdf093188b0a63231bd813c8a