Error when starting KaShell language

[Jason Hemann]

Hi all,

I wanted to play with the KaShell language (http://kashell.org/), and I
believe I followed the instructions to start. However, I see the following
error message when I try:

````
bash-3.2$ bash --version
GNU bash, version 3.2.57(1)-release (x86_64-apple-darwin17)
Copyright (C) 2007 Free Software Foundation, Inc.
bash-3.2$ kawa --version
Kawa 3.0 (git describe: 3.0-0-g39797ea94)
Copyright (C) 2017 Per Bothner
bash-3.2$ kawa --kashell
Exception in thread "main" getInstance for 'gnu.q2.lang.Q2' failed
at gnu.expr.Language.getInstance(Language.java:272)
at gnu.expr.Language.getInstance(Language.java:230)
at kawa.repl.setLanguage(repl.java:232)
at kawa.repl.processArgs(repl.java:652)
at kawa.repl.main(repl.java:820)
Caused by: java.lang.NoSuchMethodException: gnu.q2.lang.Q2.getInstance()
at java.lang.Class.getDeclaredMethod(Class.java:2130)
at gnu.expr.Language.getInstance(Language.java:259)
... 4 more
````

I'm new at using Kawa, so this could easily be some simple setup or
configuration error on my part.

Thank you in advance for your help,

Jason Hemann