Adds Hooks API

Adds Parse.Hooks.js in src/cloud-code/Parse.Hooks.js
Moves Cloud code related functions in src/cloud-code

src/cloud-code/httpRequest.js

@@ -0,0 +1,64 @@
+var request = require("request"),
+  Parse = require('parse/node').Parse;
+
+var encodeBody = function(body, headers = {}) {
+  if (typeof body !== 'object') {
+    return body;
+  }
+  var contentTypeKeys = Object.keys(headers).filter((key) => {
+    return key.match(/content-type/i) != null;
+  });
+
+  if (contentTypeKeys.length == 1) {
+    var contentType = contentTypeKeys[0];
+    if (headers[contentType].match(/application\/json/i)) {
+      body = JSON.stringify(body);
+    } else if(headers[contentType].match(/application\/x-www-form-urlencoded/i)) {
+      body = Object.keys(body).map(function(key){
+        return `${key}=${encodeURIComponent(body[key])}`
+      }).join("&");
+    }
+  }
+  return body;
+}
+
+module.exports = function(options) {
+  var promise = new Parse.Promise();
+  var callbacks = {
+    success: options.success,
+    error: options.error
+  };
+  delete options.success;
+  delete options.error;
+  delete options.uri; // not supported
+  options.body = encodeBody(options.body, options.headers);
+  // set follow redirects to false by default
+  options.followRedirect = options.followRedirects == true;
+  
+  request(options, (error, response, body) => {
+    var httpResponse = {};
+    httpResponse.status = response.statusCode;
+    httpResponse.headers = response.headers;
+    httpResponse.buffer = new Buffer(response.body);
+    httpResponse.cookies = response.headers["set-cookie"];
+    httpResponse.text = response.body;
+    try {
+      httpResponse.data = JSON.parse(response.body);
+    } catch (e) {}
+    // Consider <200 && >= 400 as errors 
+    if (error || httpResponse.status <200 || httpResponse.status >=400) {
+      if (callbacks.error) {
+        callbacks.error(httpResponse);
+      }
+      return promise.reject(httpResponse);
+    } else {
+      if (callbacks.success) {
+        callbacks.success(httpResponse);
+      }
+      return promise.resolve(httpResponse);
+    }
+  });
+  return promise;
+};
+
+module.exports.encodeBody = encodeBody;