[mono-vb] Overload resolution

[Bernie Solomon]

Is anyone working on fixing overload resolution? The current code
needs some work e.g. it takes no account of widening vs narrowing
conversions - also it seems to modify the argument list in
IsApplicable which seems dubious to me and should only be done
once the final method has been picked.

If no one is looking at it I may take some time to try and
understand it and make it behave better but if someone already is
it saves me work...

Thanks

Bernie Solomon