Add additional way to get the toolkit: git clone

Author: pitbulk

README.md

@@ -88,7 +88,13 @@ Installation
 
 ### Code ###
 
-#### Option 1. Download from github ####
+#### Option 1. clone the repository from  github ####
+
+git clone git@github.com:onelogin/php-saml.git
+
+Then pull the 3.X.X branch/tag
+
+#### Option 2. Download from github ####
 
 The toolkit is hosted on github. You can download it from:
 
@@ -100,7 +106,10 @@ Copy the core of the library inside the php application. (each application has i
 structure so take your time to locate the PHP SAML toolkit in the best place).
 See the "Guide to add SAML support to my app" to know how.
 
-#### Option 2. Composer ####
+Take in mind that the compressed file only contains the main files.
+If you plan to play with the demos, use the Option 1.
+
+#### Option 3. Composer ####
 
 The toolkit supports [composer](https://getcomposer.org/). You can find the `onelogin/php-saml` package at https://packagist.org/packages/onelogin/php-saml