Reduce hades constants from 960 to 335

[moCello]

Resolves #813

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (c053660) 85.71% compared to head (bd762a1) 85.34%.

❗ Current head bd762a1 differs from pull request most recent head cf2dcf3. Consider uploading reports for the commit cf2dcf3 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #814      +/-   ##
==========================================
- Coverage   85.71%   85.34%   -0.37%     
==========================================
  Files          57       57              
  Lines        4095     3686     -409     
==========================================
- Hits         3510     3146     -364     
+ Misses        585      540      -45     

Files	Coverage Δ
src/composer/compress/hades.rs	81.81% <ø> (ø)

... and 51 files with indirect coverage changes

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[HDauven]

LGTM, might make sense to mention this change in the changelog though.