changed attr('data-target') to data('target');

this will extend js interface, to be possible to setup targets for tabs as 
    var content=$('<div class="tab-pane">',{text: 'content'});
    var tab=('<li>',{html: $('<a>',{text: 'Main options'})}).addClass('active').data({target: $main,toggle: 'tab'}).appendTo(tabs);
adding required attribute for example signin form
Dropdown in panel header does not inherit its colors

Fix for issue #10627
Removed the unnecessary override and the !important from .wrap

In the sticky footer example there were some weird stuff..
Same fix for the navbar example of sticky footer
Use bootstrap.less file order in Customizer

Appending stylesheets by iterating the `__less` Hash creates an order
that is not the same as 'bootstrap.less'.

Some stylesheets like 'component-animations.less' and 'modals.less' have
selectors with matching specificity, and so file order decides which
style wins. This causes issue #10030 by putting `.fade.in` after
`.modal-backdrop.in` and gives the backdrop a higher opacity than
intended.

This change uses the Less ordering in 'bootstrap.less' to generate the
final stylesheets in the Customizer to make sure customized file
ordering matches the distribution file order.

Fixes #10030
remove comma separating the color and the color-stop in -webkit-linear-gradient in the #gradient .vertical mixin.
change english link text to chinese
add note to docs about Respond.js & file:// ; fixes part of #11019
make About page's HTML more valid
make Getting Started page's HTML more valid
Add description. And complete russian and spanish languages
Merge pull request #11079 from wangsai/mother-language

change english link text to chinese
Nuke trailing zeros
Merge pull request #11082 from ZDroid/nuke_zeros

Nuke trailing zeros
Merge pull request #11078 from twbs/issue-11019-note

add note to docs about Respond.js & file:// ; fixes part of #11019
Unhardcode .table-responsive bottom margin
fix .table-responsive media query; refs #11067
remove dupe content
Merge branch 'master' of github.com:twbs/bootstrap

Conflicts:
	getting-started.html