RandomInputStream for rewindable stream access to RandomInput
Alter number serialization to optimize "small" instead of optimize positive.  Costs on average a bit per number, but saves about 7 bytes for a small negative.
RewindingOpQueue that will insert rewinds into the OpQueue so that old DELETEs can be re-used as NEXT instructions.
Rewind capability working; use with a RandomInputStream.
Make ByteArrayDiffs a static class
Use RandomInputStream where available.