Tweaked gitignore

gitignore removed all composer and npm files, so automated builds would fail

conf/site/node_modules/popper.js/src/utils/isFixed.js

@@ -0,0 +1,25 @@
+import getStyleComputedProperty from './getStyleComputedProperty';
+import getParentNode from './getParentNode';
+
+/**
+ * Check if the given element is fixed or is inside a fixed parent
+ * @method
+ * @memberof Popper.Utils
+ * @argument {Element} element
+ * @argument {Element} customContainer
+ * @returns {Boolean} answer to "isFixed?"
+ */
+export default function isFixed(element) {
+  const nodeName = element.nodeName;
+  if (nodeName === 'BODY' || nodeName === 'HTML') {
+    return false;
+  }
+  if (getStyleComputedProperty(element, 'position') === 'fixed') {
+    return true;
+  }
+  const parentNode = getParentNode(element);
+  if (!parentNode) {
+    return false;
+  }
+  return isFixed(parentNode);
+}