Remove http://bugzil.la/1048279 entry from Wall of Browser Bugs
https://bugzilla.mozilla.org/show_bug.cgi?id=1048279 has been closed as WONTFIX.
Refs #14124.
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Update jspm package configuration

Make the tooltip-viewport example work

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Remove random trailing less-than symbol

Rename .scsslint.yml to .scss-lint.yml

v4-dev - Clarify the purpose of CSS class .in to .fade
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Use backticks/<code> for JS snippets in docs headings

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Add <h3> header example to Cards docs

Change grid and container sizes to px

Filled leftover placeholder in docs

Changes grid and container sizes to `px`, as the
viewport pixel size does not depend on the font size.

The actual em values were inconsistent with the docs,
while the docs were not the same as the comments:

* `sm` breakpoint was 34em (544px) not 480px.
* `lg` container max-width was 60rem (960px), less gutter than `md`.
  Changed to 940px, same as Bootstrap 3.
* `xl` container max-width was 72.25rem which is 1140px not 1156px.
  Changed to 1140px matching the comment but not the docs.

Addresses #17070 and #17388.

Port #17712 over to Bootstrap v4

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Docs: Clarify [hidden] & .hidden

Docs: Fix typo in contributing regarding normalize.css
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Only run htmllint on Travis

So as to avoid any dependence on Java for normal users of the Gruntfile.

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Closes #17699

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Travis: install npm dependencies using shrinkwrap

That way, ESLint won't look in parent dirs for configuration files.

Update devDependencies.

Update Rubygems.

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