add cards

cards.md

@@ -86,6 +86,7 @@ order: -1
 		<h3>Integrity</h3>
 		<ul>
 			<li><a href="{{ 'external/integrity/checksum' | relative_url }}">Ensuring Integrity of Data Files with Checksums</a></li>
+			<li><a href="{{ 'external/integrity/dmp' | relative_url }}">Data Management Plan</a></li>
 			<li><a href="{{ 'external/integrity/encryption/cloud' | relative_url }}">Data upload to cloud</a></li>
 			<li><a href="{{ 'external/integrity/encryption/disk' | relative_url }}">Encrypting the Startup Disk for Your Laptop/Desktop</a></li>
 			<li><a href="{{ 'external/integrity/encryption/file' | relative_url }}">Encrypting Files and Folders</a></li>