Marketing.md

 Microsite in civicrm.org -> https://civicrm.org/civicon/barcelona-2019
 
 Logo: ![CIVICRM-Global-Community-Summit-logo](uploads/08a451fdad4245f5c2bf6dfa05b95693/CIVICRM-Global-Community-Summit-logo.png)
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+Outreach to..
+NetSquared Barcelona
+https://www.meetup.com/NetSquared-Barcelona/