update foundation from 5.4.7 to 6.4.2

resources/Makefile.am

resources/foundation/css/foundation.css

resources/foundation/css/foundation.min.css

resources/foundation/css/normalize.css

resources/foundation/humans.txt

resources/foundation/img/.gitkeep

resources/foundation/index.html

resources/foundation/js/foundation.min.js

resources/foundation/js/foundation/foundation.abide.js

resources/foundation/js/foundation/foundation.accordion.js

resources/foundation/js/foundation/foundation.alert.js

resources/foundation/js/foundation/foundation.clearing.js

resources/foundation/js/foundation/foundation.dropdown.js

resources/foundation/js/foundation/foundation.equalizer.js

resources/foundation/js/foundation/foundation.interchange.js

resources/foundation/js/foundation/foundation.joyride.js

resources/foundation/js/foundation/foundation.js

resources/foundation/js/foundation/foundation.magellan.js

resources/foundation/js/foundation/foundation.offcanvas.js

resources/foundation/js/foundation/foundation.orbit.js