Update ReleaseNotes.md

Author: jakub-zarembinski

docs/ReleaseNotes.md

@@ -5,7 +5,5 @@
 EOSFactory [v3.1.1](https://github.com/tokenika/eosfactory/releases/tag/v3.1.1) is compatible with EOS [v1.7.1](https://github.com/EOSIO/eos/releases/tag/v1.7.1) and eosio.cdt [v1.6.1](https://github.com/EOSIO/eosio.cdt/releases/tag/v1.6.1).
 
 ## New features in v3.1.1
-* Compatibility with eosio.cdt version 1.6.1 that introduces substantial changes in the Smart-Contract API.
-* Removed methods *build_wast* and *build_abi* from the class *Contract* and from derived classes.
-* Removed *logger.hpp* logging facility.
-* Compatibility with [EOSIDE](https://eosfactory.io/eoside/html/index.html).
+* Gather console output from all actions (PR #155)
+* Support for arbitrary folder structure