Investigate better binary data support

[Zulu-Inuoe]

jzon performs great when given strings, but when given binary data it falls back on flexi-streams to provide a translation layer.
Unfortunately, this causes jzon to slow down tremendously.

I'd hope there's more performant ways to do this parsing that don't involve a mountain of effort. Off the top of my head, we may ditch flexi-streams and rely on babel functions to iterate over a UB8 vector and/or stream.

While a decrease of performance is tolerable, here are some benchmarks on my system when using a simple-string - jzon, and (simple-array (unsigned-byte 8) (*)) - jzon-ub8:

Testing 'countries'
Repeat = '40'

JZON
Evaluation took:
  0.862 seconds of real time
  0.859375 seconds of total run time (0.796875 user, 0.062500 system)
  99.65% CPU
  3,017,972,224 processor cycles
  312,920,896 bytes consed


JZON-UB8
Evaluation took:
  21.695 seconds of real time
  21.625000 seconds of total run time (21.312500 user, 0.312500 system)
  [ Run times consist of 0.015 seconds GC time, and 21.610 seconds non-GC time. ]
  99.68% CPU
  52 lambdas converted
  75,912,864,352 processor cycles
  1,960,107,360 bytes consed

Testing 'small-file'
Repeat = '2000'

JZON
Evaluation took:
  0.017 seconds of real time
  0.031250 seconds of total run time (0.031250 user, 0.000000 system)
  182.35% CPU
  61,817,016 processor cycles
  9,214,640 bytes consed


JZON-UB8
Evaluation took:
  0.411 seconds of real time
  0.406250 seconds of total run time (0.390625 user, 0.015625 system)
  98.78% CPU
  1,440,014,925 processor cycles
  39,246,112 bytes consed

Testing 'large-file'
Repeat = '1'

JZON
Evaluation took:
  0.463 seconds of real time
  0.437500 seconds of total run time (0.421875 user, 0.015625 system)
  94.60% CPU
  1,622,016,973 processor cycles
  135,756,384 bytes consed


JZON-UB8
Evaluation took:
  16.775 seconds of real time
  16.718750 seconds of total run time (16.484375 user, 0.234375 system)
  [ Run times consist of 0.093 seconds GC time, and 16.626 seconds non-GC time. ]
  99.67% CPU
  58,697,360,841 processor cycles
  1,224,720,768 bytes consed

Testing 'numbers'
Repeat = '1'

JZON
Evaluation took:
  0.272 seconds of real time
  0.265625 seconds of total run time (0.265625 user, 0.000000 system)
  97.79% CPU
  951,784,533 processor cycles
  39,986,704 bytes consed


JZON-UB8
Evaluation took:
  9.844 seconds of real time
  9.843750 seconds of total run time (9.625000 user, 0.218750 system)
  [ Run times consist of 0.062 seconds GC time, and 9.782 seconds non-GC time. ]
  100.00% CPU
  34,446,031,815 processor cycles
  749,442,064 bytes consed

[Zulu-Inuoe]

See discussion here - cl-babel/babel#39

it appears babel doesn't have a way to do this at the moment