simple-annotate.pl adds a new script_human dict for each script that:

* inserts the human-readable mnemonic for each instruction
* determines which operand bytes correspond to each parameter and assigns the resulting value to an entry in a params dict
* auto-converts 0 to 256 in instructions that imply that
* auto-converts delay instructions to a floating-point number of ms to facilitate reading
* auto-converts loop offsets (which are backward) and goto offsets (which are forward but signed) to their absolute addresses
* marks the target of any loop or goto so that a future pass will potentially have to do less work to make sense of the branch