FEATURE: Full height hamburger menu

- Rename `site-map` to `hamburger-menu`
- Includes acceptance tests

vendor/assets/javascripts/jquery.detect_swipe.js

@@ -0,0 +1,72 @@
+/**
+ * jquery.detectSwipe v2.1.1
+ * jQuery Plugin to obtain touch gestures from iPhone, iPod Touch, iPad and Android
+ * http://github.com/marcandre/detect_swipe
+ * Based on touchwipe by Andreas Waltl, netCU Internetagentur (http://www.netcu.de)
+ */
+(function($) {
+
+  $.detectSwipe = {
+    version: '2.1.1',
+    enabled: 'ontouchstart' in document.documentElement,
+    preventDefault: true,
+    threshold: 20
+  };
+
+  var startX,
+    startY,
+    isMoving = false;
+
+  function onTouchEnd() {
+    this.removeEventListener('touchmove', onTouchMove);
+    this.removeEventListener('touchend', onTouchEnd);
+    isMoving = false;
+  }
+
+  function onTouchMove(e) {
+    if ($.detectSwipe.preventDefault) { e.preventDefault(); }
+    if(isMoving) {
+      var x = e.touches[0].pageX;
+      var y = e.touches[0].pageY;
+      var dx = startX - x;
+      var dy = startY - y;
+      var dir;
+      if(Math.abs(dx) >= $.detectSwipe.threshold) {
+        dir = dx > 0 ? 'left' : 'right'
+      }
+      else if(Math.abs(dy) >= $.detectSwipe.threshold) {
+        dir = dy > 0 ? 'down' : 'up'
+      }
+      if(dir) {
+        onTouchEnd.call(this);
+        $(this).trigger('swipe', dir).trigger('swipe' + dir);
+      }
+    }
+  }
+
+  function onTouchStart(e) {
+    if (e.touches.length === 1) {
+      startX = e.touches[0].pageX;
+      startY = e.touches[0].pageY;
+      isMoving = true;
+      this.addEventListener('touchmove', onTouchMove, false);
+      this.addEventListener('touchend', onTouchEnd, false);
+    }
+  }
+
+  function setup() {
+    this.addEventListener && this.addEventListener('touchstart', onTouchStart, false);
+  }
+
+  function teardown() {
+    this.removeEventListener('touchstart', onTouchStart);
+  }
+
+  $.event.special.swipe = { setup: setup, teardown: teardown };
+
+  $.each(['left', 'up', 'down', 'right'], function () {
+    $.event.special['swipe' + this] = { setup: function() {
+      $(this).on('swipe', $.noop);
+    } };
+  });
+})(jQuery);