add docs footer links

refs #267
use updated HTTPS html5shiv URL
import change-version-number Grunt task from Bootstrap
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 #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
removing cursor default from icons
Fix #325: change '*' to '**/*'
remove pointer from nav trigger instead.
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
Merge pull request #330 from coliff/patch-2

Update template.html
clean up the version text under our download buttons.
adjusting the text
removed