Make all top-level disassembly functions accept base, case, and radix

options just like for DISASSEM:DISASSEMBLE.

 * DISASSEMBLE-SEGMENTS actually implements the base, case and radix
   options.
 * DISASSEMBLE doesn't implement the options but calls
   DISASSEMBLE-SEGMENTS with the appropriate args.
 * DISASSEMBLE-FUNCTION, DISASSEMBLE-MEMORY, and
   DISASSEMBLE-CODE-COMPONENT accepts the new keyword args.
 * Update the docstrings to indicate the new keyword args.