Update to Foundation 5.3.1

Ran foundation update then grunt. tested new 5.3 components.
Merge pull request #6 from gpspake/5.3.1

Update to Foundation 5.3.1 resolve #5

After procrastinating for weeks I finally sat down for 5 minutes and updated to Grunterie to Foundation 5.3.1.
I fired it up to test a couple of the [new components](http://foundation.zurb.com/docs/changelog.html) and everything seems to be working.
[Here are some screenshots of the switch and range slider components working in Grunterie](http://imgur.com/a/cPAu1)

If there is any trouble, previous versions are still available on separate branches.