Initial lua function support.

[erikarn]

This extends things to support calling functions with arbitrary numbers of command parameters. In this way lua code can be used with function arguments, rather than just /calllua 's support for simply including the entire MUD input string w/ attributes and such.

Support a single return result. Handle string, integer and float.

[ingwarsw]

Actually it cannot break anything that was working so lets merge and see in practice..

[erikarn]

thanks! yeah, it seemed like a mostly no brainer to do this.

It's a lot easier/cleaner to write the regexp/glob/hook/prompt/etc matching using tinyfugue macros and then have them call into lua methods with positional parameters.

[erikarn]

actually i wonder if setting the lua stack to 0 each time means the code can't be re-entrant. I mean, I bet lua/tf's eval stuff can't be too re-entrant in the first place? I think it's worth checking...