This checks for whether or not there are relative jumps that have not been
accounted for. When it finds that a label on a relative jump is outstanding,
it will continue past any byte or command that would usually end the script.
hg-commit-id: 20fba34f0ae2
Also, this changes how output_bank_opcodes works. Instead of calling lower()
on the entire output, each opcode and each line is individually lowercased.
As a result, the calls end up with correctly-capitalized labels.
hg-commit-id: bdde4aa404da
