add default to scss variables

Doing so allows one to override default variables when writing custom SASS that imports Ratchet's SASS.
Fix mobile navbar toggle on desktop.
removing unneeded code
removing unneeded code
Update normalize.css to v3.0.1.
Enable `disallowQuotedKeysInObjects` JSCS check and fix the remaining issues.
Gruntfile.js: remove default `report` option.
Merge pull request #519 from twbs/normalize.css

Update normalize.css to v3.0.1.
conflicts
merge
Merge pull request #517 from twbs/input-borders

No need to remove border-bottom from inputs
Merge pull request #498 from twbs/navbar-toggle

Fix mobile navbar toggle on desktop.
Merge pull request #474 from twbs/rename-var

Rename variable object keys & enable `disallowQuotedKeysInObjects` check.
Use `textContent` when `innerText` is not available.

Firefox does not implement `innerText` so this led to another `TypeError`.
Gruntfile.js: remove unneeded target.
Merge pull request #523 from twbs/grunt-remove-unused-target

Gruntfile.js: remove unneeded target.
updating the header on all the js lib files
Merge pull request #526 from twbs/mit

Consistent MIT license header
header-gradient
line up rules