casing of "long addresses" and prepares the code base for use with the full
address range of the 65816.
Use fixed size data types for addresses and target data words of known size.
Many other minor improvements.
Before this commit, we could define segment ranges; but, the disassembler wouldn't do anything with those definitions. Now, da65 will put ".segment" directives into its output.
Fixed da65's document.
