This is primarily a bugfix release for issues in 2.0.14.
1.Fixed bug where dismissed announcements would disappear forever
2.Fixed bugs with Vanilla API
3.Fixed bug with Gdn_Cache throwing a fatal error for keys that didn’t exist
4.Fixed bug with Permissions where PermissionModel::Save() wouldn’t always update the user’s permissions
5.Fixed bugs with Twitter auth for rewrite urls
6.Fixed several other low priority bugs