FIX: #13355. Added .navbar-nav to migration change list.
add IE10 viewport bug workaround to examples

Closes #13379.
document that non-:visible scrollspy targets are ignored; fixes #13394
fixes #13157 - Collapse plugin - issues with transition end event bubbling
Merge pull request #13397 from twbs/fix-13394

document that non-:visible scrollspy targets are ignored
Merge pull request #13374 from Jakobovski/fix-issue-#13355

FIX: #13355. Added .navbar-nav to migration change list.
Merge pull request #13390 from twbs/ie10-viewport-bug

add IE10 viewport bug workaround to examples
Merge pull request #13176 from twbs/fat-13157

fixes #13157 - Collapse plugin - issues with transition end event bubbli...
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
add ie-emulation-modes-warning.js to docs & examples