Support System.Char

[dbarwikowski]

All methods starting from Is like IsDigit or IsLetter
from https://msdn.microsoft.com/en-us/library/system.char(v=vs.110).aspx

[GooRiOn]

I think that we should not support all of these methods. We're not designing the language from scratch. I'd even say that we should not support char for a now since it's not that common in C# to store numbers in char type. @arekbal what's your opinion on that one?

I'd leave it now and give folks only general method - Satisfies.

[dbarwikowski]

It's not planned for 0.1.0, and it's not very usefull in my opinion, but remember, that people do weird things with code ;)