time to remove IE (issue #735)

Author: rbri

src/main/java/org/htmlunit/BrowserVersion.java

@@ -561,6 +561,15 @@ public static void setDefault(final BrowserVersion newBrowserVersion) {
         DefaultBrowserVersion_ = newBrowserVersion;
     }
 
+    /**
+     * Returns {@code true} if this <code>BrowserVersion</code> instance represents some
+     * version of Internet Explorer.
+     * @return whether version is a version of IE
+     */
+    public boolean isIE() {
+        return getNickname().startsWith("IE");
+    }
+
     /**
      * Returns {@code true} if this <code>BrowserVersion</code> instance represents some
      * version of Google Chrome. Note that Google Chrome does not return 'Chrome'