RFR 8148316: jshell tool: Configurable output format

[Robert Field]

Other changes have gone back since I put this out for review.  This is 
just a refresh sync'ed to the current dev repo.  And with fixed 
copyrights -- thanks, Shinya.

Bugs (the second (unrelated) bug was discovered and fixed in the process 
of testing):
     https://bugs.openjdk.java.net/browse/JDK-8148316
     https://bugs.openjdk.java.net/browse/JDK-8149524

Webrev:
     http://cr.openjdk.java.net/~rfield/8148316v8.webrev/

An example output configuration (Open with /open):
     http://cr.openjdk.java.net/~rfield/formats/arrowResultNlMeta.jsh

Thanks,
Robert