diff --git a/node_modules/material-design-lite/src/tooltip/tooltip.js b/node_modules/material-design-lite/src/tooltip/tooltip.js
new file mode 100644
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+++ b/node_modules/material-design-lite/src/tooltip/tooltip.js
@@ -0,0 +1,154 @@
+/**
+ * @license
+ * Copyright 2015 Google Inc. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+(function() {
+  'use strict';
+
+  /**
+   * Class constructor for Tooltip MDL component.
+   * Implements MDL component design pattern defined at:
+   * https://github.com/jasonmayes/mdl-component-design-pattern
+   *
+   * @constructor
+   * @param {HTMLElement} element The element that will be upgraded.
+   */
+  var MaterialTooltip = function MaterialTooltip(element) {
+    this.element_ = element;
+
+    // Initialize instance.
+    this.init();
+  };
+  window['MaterialTooltip'] = MaterialTooltip;
+
+  /**
+   * Store constants in one place so they can be updated easily.
+   *
+   * @enum {string | number}
+   * @private
+   */
+  MaterialTooltip.prototype.Constant_ = {
+    // None for now.
+  };
+
+  /**
+   * Store strings for class names defined by this component that are used in
+   * JavaScript. This allows us to simply change it in one place should we
+   * decide to modify at a later date.
+   *
+   * @enum {string}
+   * @private
+   */
+  MaterialTooltip.prototype.CssClasses_ = {
+    IS_ACTIVE: 'is-active',
+    BOTTOM: 'mdl-tooltip--bottom',
+    LEFT: 'mdl-tooltip--left',
+    RIGHT: 'mdl-tooltip--right',
+    TOP: 'mdl-tooltip--top'
+  };
+
+  /**
+   * Handle mouseenter for tooltip.
+   *
+   * @param {Event} event The event that fired.
+   * @private
+   */
+  MaterialTooltip.prototype.handleMouseEnter_ = function(event) {
+    var props = event.target.getBoundingClientRect();
+    var left = props.left + (props.width / 2);
+    var top = props.top + (props.height / 2);
+    var marginLeft = -1 * (this.element_.offsetWidth / 2);
+    var marginTop = -1 * (this.element_.offsetHeight / 2);
+
+    if (this.element_.classList.contains(this.CssClasses_.LEFT) || this.element_.classList.contains(this.CssClasses_.RIGHT)) {
+      left = (props.width / 2);
+      if (top + marginTop < 0) {
+        this.element_.style.top = '0';
+        this.element_.style.marginTop = '0';
+      } else {
+        this.element_.style.top = top + 'px';
+        this.element_.style.marginTop = marginTop + 'px';
+      }
+    } else {
+      if (left + marginLeft < 0) {
+        this.element_.style.left = '0';
+        this.element_.style.marginLeft = '0';
+      } else {
+        this.element_.style.left = left + 'px';
+        this.element_.style.marginLeft = marginLeft + 'px';
+      }
+    }
+
+    if (this.element_.classList.contains(this.CssClasses_.TOP)) {
+      this.element_.style.top = props.top - this.element_.offsetHeight - 10 + 'px';
+    } else if (this.element_.classList.contains(this.CssClasses_.RIGHT)) {
+      this.element_.style.left = props.left + props.width + 10 + 'px';
+    } else if (this.element_.classList.contains(this.CssClasses_.LEFT)) {
+      this.element_.style.left = props.left - this.element_.offsetWidth - 10 + 'px';
+    } else {
+      this.element_.style.top = props.top + props.height + 10 + 'px';
+    }
+
+    this.element_.classList.add(this.CssClasses_.IS_ACTIVE);
+  };
+
+  /**
+   * Hide tooltip on mouseleave or scroll
+   *
+   * @private
+   */
+  MaterialTooltip.prototype.hideTooltip_ = function() {
+    this.element_.classList.remove(this.CssClasses_.IS_ACTIVE);
+  };
+
+  /**
+   * Initialize element.
+   */
+  MaterialTooltip.prototype.init = function() {
+
+    if (this.element_) {
+      var forElId = this.element_.getAttribute('for') ||
+          this.element_.getAttribute('data-mdl-for');
+
+      if (forElId) {
+        this.forElement_ = document.getElementById(forElId);
+      }
+
+      if (this.forElement_) {
+        // It's left here because it prevents accidental text selection on Android
+        if (!this.forElement_.hasAttribute('tabindex')) {
+          this.forElement_.setAttribute('tabindex', '0');
+        }
+
+        this.boundMouseEnterHandler = this.handleMouseEnter_.bind(this);
+        this.boundMouseLeaveAndScrollHandler = this.hideTooltip_.bind(this);
+        this.forElement_.addEventListener('mouseenter', this.boundMouseEnterHandler, false);
+        this.forElement_.addEventListener('touchend', this.boundMouseEnterHandler, false);
+        this.forElement_.addEventListener('mouseleave', this.boundMouseLeaveAndScrollHandler, false);
+        window.addEventListener('scroll', this.boundMouseLeaveAndScrollHandler, true);
+        window.addEventListener('touchstart', this.boundMouseLeaveAndScrollHandler);
+      }
+    }
+  };
+
+  // The component registers itself. It can assume componentHandler is available
+  // in the global scope.
+  componentHandler.register({
+    constructor: MaterialTooltip,
+    classAsString: 'MaterialTooltip',
+    cssClass: 'mdl-tooltip'
+  });
+})();