EZWeb.py : Ezhil on the web - thin-client HTTP server - interface
using a GET request as, http://hostname/?eval=true&program=EZHILPROGRAM
ezhil.py : update to support FileExecuter, InterpExecuter classes.
Add a local_REPL method for EZWeb based interfaces
tests still at 57/5 pass/fail
EZWeb.py : handle errors in parsing/evaluation gracefully.
web/ : client-side program and HTML interface for Ezhil on the Web
ezhil.py : support multiple-line input in the interpreter gracefully using feedback from ParseException while handling corner cases correctly