Finally fixed broken Parser Lua test

This test hadn't been working right for years. Turns out the parser
exception wasn't being thrown because the messages file wasn't found,
and that got surfaced as a real exception instead. This fixes the
broken bit of Lua glue to raise a Lua error instead, then fixes the
unit test to handle either case.
Updating version to 0.2.1
Fixing LuaGlue generator for Lua 5.2