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/customlogging.js

@@ -0,0 +1,41 @@
+/*jshint strict:false*/
+/*global CasperError console phantom require*/
+
+/**
+ * A basic custom logging implementation. The idea is to (extremely) verbosely
+ * log every received resource.
+ */
+var casper = require("casper").create({
+    verbose: true,
+    logLevel: "verbose"
+});
+
+/**
+ * Every time a resource is received, a new log entry is added to the stack at
+ * the 'verbose' level.
+ */
+casper.on('resource.received', function(resource) {
+    var infos = [];
+    var props = [
+        "url",
+        "status",
+        "statusText",
+        "redirectURL",
+        "bodySize"
+    ];
+    props.forEach(function(prop) {
+        infos.push(resource[prop]);
+    });
+    resource.headers.forEach(function(header) {
+        infos.push("[" + header.name + ": " + header.value + "]");
+    });
+    this.log(infos.join(", "), "verbose");
+});
+
+// add a new 'verbose' logging level at the lowest priority
+casper.logLevels = ["verbose"].concat(casper.logLevels);
+
+// test our new logger with google
+casper.start("http://www.google.com/").run(function() {
+    this.exit();
+});