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/metaextract.js

@@ -0,0 +1,32 @@
+/*jshint strict:false*/
+/*global CasperError console phantom require*/
+
+var casper = require("casper").create();
+var url = casper.cli.get(0);
+var metas = [];
+
+if (!url) {
+    casper
+        .echo("Usage: $ casperjs metaextract.js <url>")
+        .exit(1)
+    ;
+}
+
+casper.start(url, function() {
+    metas = this.evaluate(function() {
+        var metas = [];
+        [].forEach.call(document.querySelectorAll("meta"), function(elem) {
+            var meta = {};
+            [].slice.call(elem.attributes).forEach(function(attr) {
+                meta[attr.name] = attr.value;
+            });
+            metas.push(meta);
+        });
+        return metas;
+    });
+});
+
+casper.run(function() {
+    require("utils").dump(metas);
+    this.exit();
+});