[Mono-list] Parse methods

[Nick Drochak]

All,

I got Byte.Parse(string) to work, which makes us pass the test for that.
The other overloaded Parse()'s in Byte need to handle other number
formats, and since I'm off to Hawaii for a couple of weeks, I thought
I'd just check it in and hopefully someone else can work on it while I'm
gone.

Basically what we need is the counterpart to IntegerFormatter.
Something like "NumberParser" that can extract the digits out of a valid
string and provide them to each number type for specific parsing.

Anyone want to tackle that one?  This would help us pass a whole bucket
load of unit tests!

Aloha,
Nick D.