Move frontend tests out of zerver/tests/.

This fixes an unfortunate bug where the backend tests in
zerver/tests.py were not being run automatically, and also makes these
a bit easier to find.

frontend_tests/casperjs/samples/extends.js

@@ -0,0 +1,40 @@
+/*jshint strict:false*/
+/*global CasperError console phantom require*/
+
+var casper = require("casper").create({
+    loadImages: false,
+    logLevel:   "debug",
+    verbose:    true
+});
+
+var links = {
+    "http://edition.cnn.com/": 0,
+    "http://www.nytimes.com/": 0,
+    "http://www.bbc.co.uk/": 0,
+    "http://www.guardian.co.uk/": 0
+};
+
+var fantomas = Object.create(casper);
+
+fantomas.countLinks = function() {
+    return this.evaluate(function() {
+        return __utils__.findAll("a[href]").length;
+    });
+};
+
+fantomas.renderJSON = function(what) {
+    this.echo(JSON.stringify(what, null, "  "));
+};
+
+fantomas.start();
+
+Object.keys(links).forEach(function(url) {
+    fantomas.thenOpen(url, function() {
+        links[url] = this.countLinks();
+    });
+});
+
+fantomas.run(function() {
+    this.renderJSON(links);
+    this.exit();
+});