Compare MAGiC inventories to other inventories and meta-analyses

[dlebauer]

This is separate from Calibration / Validation. But is useful for comparing how MAGiC inventories compare to other inventories and meta-analysis results. Can be used for manual tuning; aligning magnitudes.

Outcomes:

• Standardized and documented versions of other inventories / estimates of SOC and GHG in croplands.
  • Report comparing MAGiC inventories to other sources, including / especially CARB inventories (Compare outputs to previous CARB inventories #228)
  • Comparison to meta-analysis