Solving issue #533 (Spinbox submitting form)

Added type="button" to all Spinbox buttons to prevent form submission on click.
Merge pull request #536 from tad3j/patch-1

Solving issue #533 (Spinbox submitting form)
Add "button" type to wizard buttons

to finish "button type" audit
Merge branch '3.0.0-wip' of github.com:ExactTarget/fuelux into aria-support

Conflicts:
	index.html
Add type="button" back in after merge