Long Type modifier and Byte Casting

This version adds the ability to cast data back to bytes under b mode. It also adds the l modifier for dealing with long types (e.g. long int and double

Format	Data Type
i	32-bit int
h	16-bit int
f	32-bit float
s	ASCII string (greedy)
b	byte output

Modifier	Effect
u	unsigned (i and h only)
l	long type, i: int64 f: double
>	Big endian (append)
<	Little endian (append)