Responsive grid

Removed the columns and made the fieldsets responsive at various
breakpoints.
Changed ZeroClipboard to click event

This plugin wasn't working for me at all, so I don't really know what
it's supposed to do. Since it was breaking the responsive css (by
hardcoding absolute positioned DIVs), I changed it to a click event
instead of an each.

If this breaks stuff, disregard my change. I simply wasn't seeing it
display at all.