Changed last-child to first-child
As noted by @jerem the first child will actually be the last shown
replace js scrollspy test for default behavior
add "focus" to focused btns with button plugin
Allow tabs to fade in if no initially active pane is present; fixes #13814
Add a few more cases to the visual test tab page
assign background to row of .table-striped

if background is not set on row, striping doesn't work properly in responsive tables where row and cells are set to  display: block.
removing redundant background declarations on TDs
Added @gray-base variable to make @gray-{shade} reference, also allows @gray-base to be modified with less#modifyVars and the vars to cascade
Fixed @gray-base value being once space short
docs: use valid JSON in compound option value examples

Fixes #13874.
[skip sauce]
doc that you can't use both data-ride and $().carousel() on the same carousel; fixes #13896

[skip sauce]
Fix inconsistency between demo and displayed code for modal demo

Fixes #13991
Merge pull request #13992 from pjrobertson/master

Fix inconsistency between demo and displayed code for modal demo
Update dependencies.
fix #13964
Merge pull request #13993 from twbs/fix-13964

Fix #13964
Merge pull request #13988 from twbs/fix-13896

doc that you can't use both data-ride and $().carousel() on the same carousel
Use mousedown instead of click for backdrop click detection; fixes #13816
Only close modal if escape was hit with keydown; fixes #13929
Update dependencies.