update changelog and authors

AUTHORS.md

@@ -22,3 +22,4 @@ It is not a complete list, in the sense that many others have influenced the dev
 * Timothy Willey
 * Thoralf Dietrich
 * Torsten Dahm
+* Wasja Bloch

CHANGELOG.md

@@ -18,6 +18,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Jackseis: Adding `--output-steim` option to control compression. Default
   compression changed to STEIM2.
 - YAML files can now include other YAML files, when loaded through guts.
+- Moment tensor objects can now also be initialized from east-north-up
+  coordinates.
 
 ### Fixed
 - Fix plotting issues in cake.