add links to changelog

CHANGELOG.md

@@ -4,7 +4,13 @@
 
 *July 12, 2019*
 
-Special thanks to external contributors on this release:
+Special thanks to external contributors on this release: 
+@ParthDesai, @climber73, @jim380, @ashleyvega
+
+This release contains breaking changes to our build and release processes, ABCI namely:
+- Add a "Recheck Tx" indicator 
+- Removal of `db/debugDB`, `common/colors.go`, `errors/errors.go`, `common/heap.go`, `date.go`, `io.go` and
+  `GoPath()`, `Prompt()` and `IsDirEmpty()` functions from `os.go`
 
 Friendly reminder, we have a [bug bounty
 program](https://hackerone.com/tendermint).