Defined and use variables for .panel-heading & .panel-footer padding
Break csslint targets.
Fix csslint errors.
Move csslint overrides in Gruntfile.js.

This works around https://github.com/gruntjs/grunt-contrib-csslint/issues/26
Update less.js to v1.7.0.
Update grunt-contib-less.
Run `grunt`.
Merge pull request #12875 from twbs/less.js

Update Less.js
Update dependencies.
Merge pull request #12864 from twbs/csslint-fix

Csslint fix
Match docs for description
Match docs description
add 'keywords' field to bower.json
add more keywords to package.json & composer.json
add data-toggle button.js change to migration docs
Merge pull request #12905 from twbs/buttons-migration

add data-toggle button.js change to migration docs
Merge pull request #12904 from twbs/keywords

add (more) keywords to package definition files
Fixes #12593: Add support for table bodies and table rows to the collapse plugin
Merge pull request #12745 from ronnyhaase/panel-vars

Defined and use variables for .panel-heading & .panel-footer padding
grunt