more release notes

ReleaseNotes.md

@@ -10,14 +10,44 @@ across the entire codebase, with contributions from @dampir, @devkhan,
 For more information about how to use pagination in your projects refer to the
 documentation: http://octokitnet.readthedocs.io/en/latest/extensibility/#pagination
 
+ - Add Migrations API for Enterprise instances - #1141 via @devkhan
+ - Add additional parameters to `SearchIssuesRequest` -  #1228 via @ryangribble
+ - Add `Importers` property to Meta endpoint - #1235 via @ryangribble
+ - Raise HTTP 451 exception when repository has DMCA notice - #1239 via @devkhan
+ - Add Merge and Squash preview API - #1245 via @Sarmad93
+ - Add additional methods to `IEventsClient` - #1288 via @drasticactions
+ - Add Organization Permissions preview API - #1342 via @ryangribble
+ - Add GPG Keys preview API - #1343 via @alfhenrik
+
 **Fixes**
 
- - `StatisticsClient` should not clobber /api/v3/ in path - #1085 via @shiftkey
+ - Renamed `IUserKeysClient.GetAll()` to `IUserKeysClient.GetAllForCurrent()` - #1139 via ryangribble
+ - `ConfigureAwait(false)` usages added, eliminating deadlocks - #1248 via @shiftkey
+ - Renamed `CompareResult.MergedBaseCommit` to fix serialization issue - #1265 via @kivancmuslu
+ - Activity Feed now returns issues and repository events - #1288 via @drasticactions
+ - Add `Repository` property to `Issue` response - #1292 via @M-Zuber
+ - `SearchCodeRequest` now supports searching without specifying a term - #1338 via @dsplaisted
+ - Add required Permission parameter to team management APIs - #1347 via @ryangribble
+ - Add `ClosedBy` property to `Issue` - #1353 via @maddin2016
 
 **Other**
+
+ - Centralise and cleanup all the `Uri`s created in Octokit - #1287, #1290 via @dampir
 
 **Breaking Changes**
 
+ - `CompareResult.MergedBaseCommit` was never deserialized correctly, and has
+    been marked as obsolete. You should use `CompareResult.MergeBaseCommit`
+
+ - `IEventsClient.GetAllForRepository` was incorrectly retrieving issue
+    events before this release. Use the new `IEventsClient.GetAllIssuesForRepository`
+    method if you still require issues, or continue to use `IEventsClient.GetAllForRepository`
+    if you require all repository events.
+
+ - `IUsersClient` has a property named `Keys` which has been renamed in the
+   GitHub API documentation - Octokit has added the name `GitSshKeys` to
+   reflect this change, and `Keys` will be removed in a later release.
+
 ### New in 0.19.0 (released 2016/03/11)
 
 **Features**