Updated Changelog (markdown)

Changelog.md

@@ -4,13 +4,18 @@ 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) | [cleaner](https://github.com/ReCodEx/cleaner/releases) |
 | --- |:---:|:---:|:---:|:---:|:---:|:---:|:---:|
+| 26.10.2019    |  v1.18.3 |  v1.18.2 |  v1.6.2  |  v1.3.0  |  v1.2.1  |  v1.0.0  |  v1.1.0  |
 | 5.10.2019     |  v1.18.2 |  v1.18.1 |  v1.6.2  |  v1.3.0  |  v1.2.1  |  v1.0.0  |  v1.1.0  |
 | 22.9.2019     |  v1.18.1 |  v1.18.0 |  v1.6.2  |  v1.3.0  |  v1.2.1  |  v1.0.0  |  v1.1.0  |
 | 23.5.2019     |  v1.17.0 |  v1.17.0 |  v1.6.2  |  v1.3.0  |  v1.2.1  |  v1.0.0  |  v1.1.0  |
-| 15.4.2019     |  v1.16.1 |  v1.16.0 |  v1.6.2  |  v1.3.0  |  v1.2.1  |  v1.0.0  |  v1.1.0  |
 
 Older versions are at the bottom of this page.
 
+## 26.10.2019
+* Updates in SIS module -- supervisors may unbind a groups, students no longer see organizational groups.
+* Fixing bugs in error messages and their translations.
+* Group relocation feature added for superadmin.
+
 ## 5.10.2019
 * Better handling of unauthorized requests.
 * Improving user switching controls (superadmin stuff).
@@ -294,6 +299,7 @@ Older versions are at the bottom of this page.
 
 | 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) | [cleaner](https://github.com/ReCodEx/cleaner/releases) |
 | --- |:---:|:---:|:---:|:---:|:---:|:---:|:---:|
+| 15.4.2019     |  v1.16.1 |  v1.16.0 |  v1.6.2  |  v1.3.0  |  v1.2.1  |  v1.0.0  |  v1.1.0  |
 | 24.3.2019     |  v1.15.2 |  v1.15.2 |  v1.6.1  |  v1.3.0  |  v1.2.1  |  v1.0.0  |  v1.1.0  |
 | 8.3.2019      |  v1.15.1 |  v1.15.1 |  v1.6.1  |  v1.3.0  |  v1.2.1  |  v1.0.0  |  v1.1.0  |
 | 17.2.2019     |  v1.15.0 |  v1.15.0 |  v1.6.1  |  v1.3.0  |  v1.2.1  |  v1.0.0  |  v1.1.0  |