Update changelog for release 0.2

Changelog.md

@@ -1,10 +1,35 @@
 # Change Log
 
-## Unreleased features and issues
-
 Please see [here](https://github.com/NLnetLabs/krill/projects?query=is%3Aopen+sort%3Aname-asc)
 for planned releases. 
 
+## 0.2.0 'Interkrillactic, Planetary'
+
+This release focused on testing, and fixing, any issues found when running Krill under various
+parent CAs (Apnic, Lacnic and RIPE NCC). ROAs were tested using routinator, OctoRPKI, FORT, RIPE
+NCC RPKI Validator 2.x and 3.x.
+
+Furthermore, the CLI got a big overhaul aimed at making it easier to use, especially for users
+who manage one CA only. You can now use ENV variables to set defaults for the Krill instance to
+connect to, the token, and which CA you want to operate on.
+
+We also added the '--api' argument which will simply print out the API call that the CLI would
+have made, without executing it. We plan to add proper (OpenAPI) documentation for the API, but
+for the moment this can help to explore it.
+
+Updated documentation can be found on [Read the Docs](https://rpki.readthedocs.io/en/latest/krill/index.html).
+
+Known issues:
+* Despite our best efforts RIPE NCC RPKI Validator 3.1 is the only remaining RP we tested, which
+  does not seem to like our manifests. We will look into this again later. (#115)
+* There appears to be a race condition that can cause commands to be processed twice. (#64)
+* Showing the full history, or logging it in case of the above condition, uses too much memory. (#112)
+* The CA and publication server can be out of sync after a re-start. (#116)
+
+Work for the next release has already started. [Release 0.3](https://github.com/NLnetLabs/krill/projects/6)
+will focus on (remote) publication, and will also solve the out-of-sync issue.
+
+
 ## 0.1.0 'A View to a Krill'
 
 This is the first version of Krill that we are testing in the real world. Please note that the