+ Refactored MarketingCampaign into List/Detail
+ Fixed minor bugs in GroupDetail
+ New Event (Group) Page/Blocks
+ New LinkedPageAttribute so that Block knows what Page to navigate to when a Hyperlink is clicked.  For example, this is used in MarketingCampaignDetail so that a Hyperlink for the Event can be created
Merge remote-tracking branch 'origin/develop' into develop