Add classes for calibrating average ensemble and ensemble of tragedies - #1048

  1 files  ±0    1 suites  ±0   6m 2s ⏱️ - 1m 1s
758 tests +3  757 ✅ +3  1 💤 ±0  0 ❌ ±0 
769 runs  +3  768 ✅ +3  1 💤 ±0  0 ❌ ±0 

Results for commit 51630a6. ± Comparison against earlier commit 5c988ec.