Stream: delta impl (#21)

Delta stream implementation, test fixes, benchmark updates.

Better comments

Decode: Slightly faster scalar impl (#16)

Switches the scalar decodeOne to dedicated instructions per size rather than using fall through behavior.

streambyte-simdo: v1 updates (#2)

v1 implementation. Includes

- a scalar encode and decode
- amd64 simd encode and decode
- some basic tests