Resolves #10923

Rebased from #10930
nuke commented out docs css
Ditch `&`, as `+ ...` is enought
Merge pull request #11102 from ZDroid/less-fix

Ditch `&`, as `+ ...` is enought
Add Note About Changing to MIT
Merge pull request #11105 from twbs/license-note

Add notes about dual-licensing contributions before switching to MIT in v3.1
update jumbotron docs; fixes #11109
Merge branch 'master' of github.com:twbs/bootstrap
Include a note about text-based form control styling

fixes #8824.
Merge pull request #11110 from nikolawannabe/patch-1

Include a note about text-based form control styling
add dots to class name references for consistency
Fixed broken link
Merge pull request #11128 from lipis/patch-3

Fixed broken link in README.md
redo the glyphicons icons list to make icons not blurry on edges /cc @jankovarik
Merge branch 'master' of github.com:twbs/bootstrap
upgrade to html5shiv v 3.7.0
add note about third-party JS, CDNs, and HTTPS
Merge pull request #11137 from twbs/explain-https

add note about third-party JS, CDNs, and HTTPS
Update translation URL
Merge pull request #11141 from vincentchan/master

Update translation sites URL