Add release notes for 10.14.0 and 10.15.0 (#276)

* add release nodes for 10.14.0 and 10.15.0

* add release notes 10.15.0

* fix typos

* fix typo

* refrase sentance

* rewrite with feedback from Dans

* add discover provider pr to change log

Author: CorgiMan

CHANGES.md

@@ -0,0 +1,40 @@
+ringpop-node release notes
+==========================
+
+10.15.0
+-------
+
+* Feature: Automatic partition detection and recovery
+ [#272](https://github.com/uber/ringpop-node/pull/272)
+* Feature: Bidirectional full syncs for more robust gossip [#251](https://github.com/uber/ringpop-node/pull/251)
+* Feature: Automatic cleanup of faulty nodes from membership [#257](https://github.com/uber/ringpop-node/pull/257)
+* Deprecated: "admin/reload"-endpoint [#255](https://github.com/uber/ringpop-node/pull/255)
+* Refactor: DiscoverProvider abstraction to discover bootstrap hosts [#253](https://github.com/uber/ringpop-node/pull/253)
+* Various fixes and improvements for test suite [#263](https://github.com/uber/ringpop-node/pull/263) [#262](https://github.com/uber/ringpop-node/pull/262) [#254](https://github.com/uber/ringpop-node/pull/254) [#245](https://github.com/uber/ringpop-node/pull/245)
+
+
+### Release notes
+
+* **Automatic reaping of faulty nodes**
+
+    Previously nodes marked as faulty would stay in the memberlist indefinitely. Since, 10.15.0 these nodes will be automatically removed after 24 hours by default.
+
+    You can customize the reaping delay using the `stateTimeouts.faulty` (default 86400000ms = 24h) option.
+
+    If you are upgrading please try to upgrade the entire cluster before the reaping kicks in (24 hours). When ran together with an older version for a prolonged period of time an increase in cpu and bandwidth utilization is expected.
+
+* **Automatic partition healing**
+
+    Ringpop now automatically heals partitions by querying the bootstrap provider (e.g. reading file from disk) and reaching out to the nodes that could live in another partition. This causes reads/queries to the bootstrap provider *after* the initial bootstrap.
+
+    The algorithm attempts to heal 3 times per 30s on average, over the entire cluster. You can customize this using the `discoverProviderHealerBaseProbability` (default 3), `discoverProviderHealerPeriod` (default 30000ms = 30s) options.
+
+Both Reaping faulty nodes and Partition healing can be triggered manually in as well with ringpop-admin v0.13.0 via `ringpop-admin heal ip:port` and `ringpop-admin reap ip:port`. This version is backwards compatible and therefore should be a drop in replacement.
+
+
+10.14.0
+-------
+
+* Feature: Partition detection by adding ring and membership checksum stats [#247](https://github.com/uber/ringpop-node/pull/247)
+* Update TChannel to latest [#243](https://github.com/uber/ringpop-node/pull/243)
+* Improve README [#240](https://github.com/uber/ringpop-node/pull/240)