use better userAgent strings

Author: martintajur

lib/restler.js

@@ -1,11 +1,14 @@
 var fetchUrl = require('fetch').fetchUrl,
 	qs = require('qs'),
 	util = require('util'),
+	bundle = require('../package.json'),
 	EventEmitter= require('events').EventEmitter,
 	urllib = require('url'),
 	_ = require('lodash'),
+	os = require('os'),
 	mime = require('mime'),
 	fs = require('fs'),
+	instanceHash = require('crypto').createHash('sha1').update(__dirname).digest('hex'),
 	async = require('async');
 
 module.exports = {
@@ -93,7 +96,7 @@ function Request(method, url, options){
 		payload: payload,
 		headers: headers,
 		disableDecoding: true,
-		userAgent: 'Pipedrive API (+https://www.pipedrive.com/)',
+		userAgent: 'pipedrive-client-nodejs/' + bundle.version + ' (' + os.type() + ', ' + os.platform() + '/' + os.release() + ' , /' + instanceHash + ')',
 		agent: false,
 		asyncDnsLoookup: process.env.PIPEDRIVE_API_DNS_LOOKUP == '1' ? true : false,
 		timeout: 10 * 1000,