Update readme.md

Adding basic formatting / testing steps

Author: ajbdev

readme.md

@@ -1,4 +1,4 @@
-AuthorizeNet PHP-SDK Reloaded
+# AuthorizeNet PHP-SDK Reloaded
 
 This library is a fork of the official Authorize.Net PHP SDK to include the following features:
  - PHP 5.3 compatible
@@ -7,9 +7,19 @@ This library is a fork of the official Authorize.Net PHP SDK to include the foll
  - Namespaced
  - Unit tested (work in progress)
 
+## Testing
+1) Set Authorize.net credentials
 
+define("AUTHORIZENET_API_LOGIN_ID", "");
+define("AUTHORIZENET_TRANSACTION_KEY", "");
 
-License
+at tests/bootstrap.php
+
+2) Run tests: `phpunit .`
+
+
+
+## License
 
 Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: