Update README.md

Added documentation for using Mandrill email service

README.md

@@ -303,6 +303,15 @@ The same goes for other providers.
 - Sign up and add your *Domain Name*
 - From the domain overview, copy and paste the default SMTP *Login* and *Password* into `config/secrets.js`
 
+<hr>
+
+<img src="http://cdn.appstorm.net/web.appstorm.net/web/files/2013/12/mandrill-logo.png" width="100">
+- Go to http://mandrill.com
+- Sign up and add your *Domain Name*
+- From the dashboard, click on *Get SMTP credentials 
+- Copy and paste the default SMTP *Login* and *Password* into `config/secrets.js`
+
+
 Project Structure
 -----------------
 
@@ -363,7 +372,6 @@ List of Packages
 | github-api                      | GitHub API library. |
 | jade                            | Template engine for Express. |
 | lastfm                          | Last.fm API library. |
-| instagram-node                  | Instagram API library. |
 | less                            | LESS compiler. Used implicitly by connect-assets. |
 | lusca                           | CSRF middleware.        |
 | mongoose                        | MongoDB ODM. |
@@ -375,7 +383,6 @@ List of Packages
 | passport-github                 | Sign-in with GitHub plugin. |
 | passport-google-oauth           | Sign-in with Google plugin. |
 | passport-twitter                | Sign-in with Twitter plugin. |
-| passport-instagram              | Sign-in with Instagram plugin. |
 | passport-local                  | Sign-in with Username and Password plugin. |
 | passport-linkedin-oauth2        | Sign-in with LinkedIn plugin. |
 | passport-oauth                  | Allows you to set up your own OAuth 1.0a and OAuth 2.0 strategies. |
@@ -602,7 +609,7 @@ reference guide. I have explained my reasons why it could not be merged in
 ### How do I switch SendGrid for another email delivery service?
 Run `node generator.js` bundled with Hackathon Starter, then select
 **Email Service** option. It will automatically replace appropriate strings in
-your code. Currently there are only two options: SendGrid and Mailgun.
+your code. Currently there are three options: SendGrid, Mandrill, and Mailgun.
 
 How It Works (mini guides)
 --------------------------