add script to warn folks trying to test old IE using IE's unreliable emulation modes
remove semicolons :'-(
add IE warning scripts to linter config
Document that @import-ing Bootstrap can break the icon font path

Addresses part of #13429.
Update JSZip to v2.2.1.
Update holder.js to v2.3.2.
Run `grunt`.
Minor Spacing fixes

Flagged upstream in bootstrap-sass by scss-lint
Merge pull request #13439 from nschonni/spacing-fixes

Minor Spacing fixes
Merge pull request #13435 from twbs/doc-less-import-glyphicons

Document that @import-ing Bootstrap can break the icon font path
add ie-emulation-modes-warning.js to docs & examples
Merge pull request #13422 from twbs/ie-emulation-modes-warning

Warn about IE emulation modes in docs+examples
Merge pull request #13424 from twbs/docs-libs

Update docs libs
Tweak JS style and the relevant JSHint and JSCS checks.
Comply to the new style.
Remove `laxbreak`.
Remove `boss`.
Enable `requireCurlyBraces`.
Enable `es3`.
Switch to using plain `if/else` statements when there's no assignment.

The minizer outputs the same code anyway, and this has better readability.