Add latest additions to the CWL ecosystem

Courtesy @jvdzwaan, @sverhoeven, and @kloetzl

Author: mr-c

README.md

@@ -75,6 +75,8 @@ Please cite https://dx.doi.org/10.6084/m9.figshare.3115156.v2
 |[cwlavro](https://github.com/common-workflow-language/cwlavro)|Java classes for loading CWL documents|
 |[acd2cwl](https://github.com/common-workflow-language/acd2cwl)|CWL generator for ACD (EMBOSS) files |
 |[CWLviewer](https://view.commonwl.org/)|A web application to view and share Common Workflow Language workflows|
+|[scriptcwl](https://github.com/NLeSC/scriptcwl)|Create CWL workflows by writing a simple Python script|
+|[cwl2zshcomp](https://github.com/kloetzl/cwl2zshcomp)|generates ZSH auto completions from CWL command line tool descriptions|
 
 ## Support, Community and Contributing