Update changelog

CHANGES.md

@@ -1,14 +1,29 @@
 ringpop-go changes
 ==================
 
-NEXT
+v0.8.0
 ------
 
+* Feature: Self-eviction [#177](https://github.com/uber/ringpop-go/pull/177)
+* Travis: Remove Go 1.5 support [#187](https://github.com/uber/ringpop-go/pull/187)
+* Fix: ineffectual assignments [#193](https://github.com/uber/ringpop-go/pull/193)
+* Feature: Identity Carry Over [#188](https://github.com/uber/ringpop-go/pull/188) [#189](https://github.com/uber/ringpop-go/pull/189) [#190](https://github.com/uber/ringpop-go/pull/190) [#191](https://github.com/uber/ringpop-go/pull/191) [#192](https://github.com/uber/ringpop-go/pull/192) [#194](https://github.com/uber/ringpop-go/pull/194) [#195](https://github.com/uber/ringpop-go/pull/195)
+* Fix: Make lookups consistent on hash collisions [#196](https://github.com/uber/ringpop-go/pull/196)   
+
 ### Release notes
 
-#### Change to identity-option
+#### Identity Carry Over
+Identity carry over provides a way to manually configure the identity of a member on a hashring. 
+By changing the identity to be something else than it's address, it becomes possible to guarantee ring equality before and after deploys in a dynamic environment (e.g. mesos).
+
+#### Self Eviction 
+By calling `ringpop.SelfEvict` on shutdown, a member will declare itself as `faulty` and gossips this to the other members.
+This removes the time window where it was marked as `suspect`; in this way removing the time where other members 
+considered it to be part of the ring while it was not responding anymore. 
+
+#### Breaking change to the `identity`-option
 
-Prior to ringpop NEXT the address was used as the identity of a member. Starting with version NEXT, it's possible to
+Prior to ringpop v0.8.0 the address was used as the identity of a member. Starting with version v0.8.0, it's possible to
 configure a separate identity. As a result, the behaviour of the `Identity` and `IdentityResolverFunc` has been changed.
 The `Identity` option now configures the identity of a member and will return an error when it matches an ip:port; services 
 that were using `Identity` or `IdentityResolverFunc` should now use the `Address` and `AddressResolverFunc` options.