Updated Changelog (markdown)

Changelog.md

@@ -4,7 +4,7 @@ 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) |
 | --- |:---:|:---:|:---:|:---:|:---:|:---:|
-| 25.2.2018    |  v1.?  |  v1.6.0  |  v1.3.0  |  v1.2.0  |  v1.2.1  |  v1.0.0  |
+| 25.2.2018    |  v1.6.0  |  v1.6.0  |  v1.3.0  |  v1.2.0  |  v1.2.1  |  v1.0.0  |
 | 15.2.2018    |  v1.5.0  |  v1.5.0  |  v1.3.0  |  v1.2.0  |  v1.2.1  |  v1.0.0  |
 | 16.1.2018    |  v1.4.4  |  v1.4.4  |  v1.2.1  |  v1.2.0  |  v1.2.1  |  v1.0.0  |
 | 3.1.2018    |  v1.4.3  |  v1.4.3  |  v1.2.1  |  v1.2.0  |  v1.2.1  |  v1.0.0  |
@@ -12,7 +12,14 @@ This change log tracks the releases on our [pilot server](https://recodex.mff.cu
 
 ## 25.2.2018
 
-* ...
+* Test limits were redesigned
+** Move to a separate page in the UI
+** Changed internally in the API (simple limits endpoints were removed)
+* Hardware group selection was added to the limits page
+** Second hardware group for long-running exercises added
+** Limits constraints are now bound to selected hardware group
+* Students can see stats table when enabled in group settings
+* Many bugs were fixed; number of submitted solutions reflects correct state (#153)
 
 ## 15.2.2018