Version 2.0 was branched from v1.16, and has all the functionality of v1.20.
No new CRASSH features were introduced with v2.0 but in order to support CI and testing the code had to be completely re-structured. CI & Testing should ensure crassh continues to work as before, but if there are issues users can download v1.20 from the releases page. Status of build can be reviewed on [CRASSH's CI page](https://travis-ci.org/linickx/crassh).