refactor app directory structure and add tests

tests/node_modules/nightwatch/lib/api/client-commands/_locateStrategy.js

@@ -0,0 +1,24 @@
+var util = require('util');
+var events = require('events');
+
+function Command() {
+  events.EventEmitter.call(this);
+}
+
+util.inherits(Command, events.EventEmitter);
+
+Command.prototype.command = function(callback) {
+  var self = this;
+
+  this.client.locateStrategy = this.strategy;
+  process.nextTick(function() {
+    if (typeof callback == 'function') {
+      callback.call(self.client.api);
+    }
+    self.emit('complete');
+  });
+
+  return this;
+};
+
+module.exports = Command;