Update CHANGELOG with new entries for 6.1

CHANGELOG

@@ -13,6 +13,10 @@ v 6.1.0
   - Remove deprecated classes and rake tasks
   - Add event filter for group and project show pages
   - Add links to create branch/tag from project home page
+  - Add public-project? checkbox to new-project view
+  - Improved compare page. Added link to proceed into Merge Request
+  - Send email to user when he was added to group
+  - New landing page when you have 0 projects
 v 6.0.0
   - Feature: Replace teams with group membership