v1.6.0

Includes new features to support the incorporation of Import Emission Factors (IEFs) for single and two-region models, results in new matrices A_m, M_m and N_m and a new ImportMatrix dataframe and removes the M and N matrices for these models with IEFs (but not for existing models).
Detail (USEEIOv2.3-GHG) and summary model (USEEIOv2.3-s-GHG-19) based on 2019 GHG data are added with IEFs from EXIOBASE.
Household/final user emissions are added via matrix, B_h
Functions are hidden from the API but are still present in package, including:
aggregateResultMatrixbyRow(), compare2RCommodityTotals(), compareCommodityOutputXMarketShareandIndustryOutputwithCPITransformation(), compareCommodityOutputandDomesticUseplusProductionDemand(), compareEandLCIResult(), and compareOutputandLeontiefXDemand()

This is a pre-release because some functions are temporarily hidden from the user due to lack of compatibility with new models with IEFs.
These include: calculateMarginSectorImpacts(), calculateSectorContributiontoImpact(), calculateFlowContributiontoImpact(), and disaggregateTotalToDirectAndTier1()
These will be restored in a future release.

Full Changelog: v1.5.3...v1.6.0