plus one example that still used the old <div role="navigation"> and a
fix-up of the callout as per
https://github.com/twbs/bootstrap/issues/15109

bump remarkable devDependency to ~1.4.1

[skip sauce]

Give all docs callouts IDs
[skip sauce]

Pin npm-shrinkwrap to v5.0.0 so that it works with npm 2.x.

[ci skip]

[skip sauce]

Saves 3.4KB.

Fix .form-inline docs example

Fixes #15105.

Make sample code match live example
Move <label> out of .input-group into .form-group instead
Change field from Email to Username to make it less redundant, slightly more realistic
Add <label> for Username field for consistency
Fixes #15118

add link to MDN docs regarding iOS Safari element clickability

move data attributes callout into data attributes doc subsection

JS docs: add Options, Methods, Events subsections to nav sidebar

Fixed a typo in Sign-in page example

Fixed a typo in Sign-in page example
http://getbootstrap.com/examples/signin/

Move all callouts to be adjacent to each other
Combine JS-related callouts into a single callout

move scrollspy callouts so they're all adjacent to each other
[skip sauce]

move popover examples heading to directly before the actual examples

Add labels explanation to readme

Dropdown: ignore keydown events coming from `input`s and `textarea`s

Fixes #15084.

Wash-up of some stray dropdown examples