switch to margin on navbar-nav to avoid stacking negative space reported in #9705
docs cleanup on naming to fix #9710
finish up second pass through docs nav, headings, organization, naming, etc (another run through at #9710)
basic cleanup on carousel example (fixes #9709 and #9700)
Justified nav now responsive; example updated accordingly (fixes #9708)
increase spacing on homepage links and social buttons (fixes #9706)
fixes #9701: fix up offcanvas example
carousel example: add dummy 'src' attributes to <img>s
carousel example: add alt text to images
Merge pull request #9717 from twbs/carousel-html-compliance

Fix carousel example to pass HTML5 validator
fixes #9475
Make negative margins on rows the default, not just in containers, and add padding to body to compensate
Merge pull request #9718 from twbs/bs3_row_margins

BS3: Simpler row margins