Added release date for 2.2.1.
Added release date for 2.2.1.

MarkusH/django,monetate/django,rsalmaso/django,felixxm/django,django/django,fenginx/django,blighj/django,monetate/django,MarkusH/django,koordinates/django,theo-l/django,rsalmaso/django,takis/django,apollo13/django,ghickman/django,solarissmoke/django,elena/django,blighj/django,felixxm/django,fenginx/django,fenginx/django,claudep/django,shaib/django,auvipy/django,schinckel/django,auvipy/django,rsalmaso/django,georgemarshall/django,adamchainz/django,googleinterns/django,googleinterns/django,theo-l/django,manhhomienbienthuy/django,schinckel/django,georgemarshall/django,takis/django,manhhomienbienthuy/django,elena/django,atul-bhouraskar/django,blighj/django,django/django,claudep/django,pauloxnet/django,atul-bhouraskar/django,shaib/django,shaib/django,adamchainz/django,ghickman/django,pauloxnet/django,django/django,MarkusH/django,dsanders11/django,kaedroho/django,elena/django,simonw/django,dsanders11/django,atul-bhouraskar/django,auvipy/django,manhhomienbienthuy/django,solarissmoke/django,solarissmoke/django,adamchainz/django,adamchainz/django,claudep/django,takis/django,koordinates/django,atul-bhouraskar/django,MarkusH/django,ghickman/django,simonw/django,django/django,freakboy3742/django,apollo13/django,pauloxnet/django,koordinates/django,schinckel/django,kaedroho/django,simonw/django,apollo13/django,dsanders11/django,blighj/django,ghickman/django,shaib/django,fenginx/django,solarissmoke/django,googleinterns/django,kaedroho/django,googleinterns/django,freakboy3742/django,monetate/django,auvipy/django,elena/django,wkschwartz/django,theo-l/django,felixxm/django,theo-l/django,monetate/django,takis/django,simonw/django,koordinates/django,pauloxnet/django,wkschwartz/django,wkschwartz/django,wkschwartz/django,schinckel/django,felixxm/django,freakboy3742/django,rsalmaso/django,claudep/django,georgemarshall/django,georgemarshall/django,manhhomienbienthuy/django,apollo13/django,dsanders11/django