Modified template to correctly check for Zepto support

The template loaded both Zepto and jQuery, then loaded the Foundation
components, then performed a (broken) check for Zepto support. This has
been modified to correctly check for Zepto support, then load the
Foundation compoenents. jQuery is only loaded if Zepto is unsupported.
Merge pull request #2 from bfin/zepto_check

Modified template to correctly check for Zepto support