Added a breadcrumbs gem.

Added a custom builder for that gem, so that it would
produce output using Foundation-compliant CSS.

Added code to render that breadcrumb trail to the
global layout, and removed equivalent code from all
view templates.

Finally, added statements within individual controller
methods to properly populate breadcrumb trails
make user_links more foundation-compliant
new file as part of foundation 4
these files now include calls to foundation libraries