20.4.2018 release

Changelog.md

@@ -4,12 +4,17 @@ This change log tracks the releases on our [pilot server](https://recodex.mff.cu
 
 | Date | [web-app](https://github.com/ReCodEx/web-app/releases) | [api](https://github.com/ReCodEx/api/releases) | [worker](https://github.com/ReCodEx/worker/releases) | [broker](https://github.com/ReCodEx/broker/releases) | [fileserver](https://github.com/ReCodEx/fileserver/releases) | [monitor](https://github.com/ReCodEx/monitor/releases) |
 | --- |:---:|:---:|:---:|:---:|:---:|:---:|
+| 20.4.2018     |  v1.7.2  |  v1.8.1  |  v1.4.0  |  v1.2.1  |  v1.2.1  |  v1.0.0  |
 | 17.4.2018     |  v1.7.2  |  v1.8.0  |  v1.4.0  |  v1.2.1  |  v1.2.1  |  v1.0.0  |
 | 14.4.2018     |  v1.7.1  |  v1.8.0  |  v1.4.0  |  v1.2.0  |  v1.2.1  |  v1.0.0  |
 | 28.3.2018     |  v1.7.0  |  v1.7.0  |  v1.3.0  |  v1.2.0  |  v1.2.1  |  v1.0.0  |
 
 Older versions are at the bottom of this page.
 
+## 20.4.2018
+
+* Various bugfixes and optimisations in REST Api
+
 ## 17.4.2018
 
 * Switching to Font Awesome 5 icons