add NumToBin, add opt arg for NumToHex, add binary conversion support…

[Demorome]

… for ToNumber.

NumToBin syntax: NumToBin num:int padToLengthWithLeadingZeros:int{Default:32} addPrefix:bool{Default:0} The prefix is just for adding 0b, which if added can now be read by ToNumber to interpret the number as binary.

Also added this addPrefix arg to NumToHex, where it'll add 0x. ToNumber already supported reading numbers that started with 0x, but there wasn't a convenient way to do that with just NumToHex.