Added documentation on the -symbols switch, and modified syntax of multiple start symbols (see previous code checkin).
Added documentation on the -symbols switch, and modified syntax of
multiple start symbols (see previous code checkin).

blue-systems-group/project.maybe.polyglot,blue-systems-group/project.maybe.polyglot,xcv58/polyglot,xcv58/polyglot,blue-systems-group/project.maybe.polyglot,xcv58/polyglot,liujed/polyglot-eclipse,liujed/polyglot-eclipse,liujed/polyglot-eclipse,liujed/polyglot-eclipse,xcv58/polyglot,blue-systems-group/project.maybe.polyglot