add docs footer links

refs #267
use updated HTTPS html5shiv URL
import change-version-number Grunt task from Bootstrap
Remove unused class.
Insert final newline in CNAME

Just to follow `.editorconfig`.
Remove third slash in "file:///"
Add examples link
Correct lists indent
Update template.html

Updated Twitter URL to https (saves a HTTP redirect as all Twitter pages served over https anyway)
Update template.html

Add correct URL for 'Ratchet on Github'
Merge pull request #328 from ZDroid/cname-eof-nl

Insert final newline in CNAME
Merge pull request #329 from ZDroid/file-formatting

Improve readme
Merge pull request #331 from coliff/patch-3

Update template.html
Merge pull request #293 from twbs/version-number-changer

import change-version-number Grunt task from Bootstrap
add link to project website in banner comments; fixes #297
Merge pull request #315 from twbs/html5shim

use updated HTTPS html5shiv URL
makin dem links look good.
dem conflicts
Merge pull request #292 from twbs/docs-footer-links

add docs footer links
Merge pull request #339 from twbs/banner-url

add link to project website in banner comments