tests: Adjust various test cases for 64bit
rtlib: Add missing Bin/Hex/WBin/WHex overloads for UByte/UShort
rtlib: Re-use LongInt Bin/Oct/Hex functions to implement 32bit ones

This basically makes the following commit easier to implement, by
removing some duplicate code.
rtlib: Make Bin/Oct/Hex prepend zeroes if needed to match wanted digits

I think this is good because when calling
	bin( x, 32 )
I think it should return 32 digits no matter what integer type x is,
afterall it's an explicit request for a specific amount of digits.