fixes #8066: add missing % functions to grid less code
prep for less 1.4 with double parens in functions
restore .col-*-12 classes for now
nuke the .col
fix docs highlighting of grid
reverse order of grid column examples for dual grid section
Update css.html

Missing word "in" in "Someone famous in Source Title"
Set validation states also for addons
Another grid update

* Update docs to include table of grid levels and behaviors
* Change from .col-md to .col-sm to match existing size variables we use elsewhere
* Keep .col-lg as-is though for simplicity as we won't likely add a fourth level of the grid
* Combine responsive .container breakpoints with grid breakpoints in grid.less
* Other misc docs updates
add new grid subnav link
Merge pull request #8097 from burnsra/3.0.0-wip-addons

Set validation states also for addons
Merge pull request #8080 from mladenplavsic/patch-2

Update css.html
Redo grid documentation

* Update example sections to include basic, mobile-desktop, and mobile-tablet-desktop implementations
* Add more examples to the grid example page
* Red columns instead of gray for more Bootstrapy aesthetic
No more need for grid column highlighting, so nuke that
Update docs JS to prevent clicks on links with hash hrefs
Merge branch '3.0.0-wip' of github.com:twitter/bootstrap into 3.0.0-wip
fix JSON syntax error in composer.json
Merge pull request #8124 from eins78/3.0.0-wip-fix-json

fix JSON syntax error in composer.json
Adding html extension to docs menu
Merge remote-tracking branch 'upstream/3.0.0-wip' into 3.0.0-wip