changed foundation version to 4.3.2 for bugfixes

This fixes:
- "Uncaught ReferenceError: t_top is not defined" on window resize
- other rendering bugs preventing dropdown with scroll
made dropdown scrollable on baggers + rh

On page load and window resize set max-height to
$(window).height() + 50 for $('ul.dropdown ul.dropdown')
the magic number was: $("nav.top-bar").height()
Merge pull request #136 from janosgyerik/dropdown-fix

Make the bagger menu list scrollable