Merge pull request USEPA#315 from USEPA/v1.3.1-release

V1.3.1 release

Created a GHG_national_m1 FBS method that uses BLS QCEW Employment da…

…ta as an attribution source to reach NAICS-6.

Merge pull request USEPA#301 from USEPA/v1.3-release

V1.3 release

Merge pull request USEPA#263 from USEPA/v1.2.4-release

V1.2.4 release

Merge pull request USEPA#253 from USEPA/v1.2.3-release

V1.2.3 release

updates to setup.py

Merge pull request USEPA#228 from USEPA/v1.2.1_release

V1.2.1 release

modify to MIT license

Merge pull request USEPA#170 from USEPA/v1.1-release

V1.1 release

Merge pull request USEPA#159 from USEPA/fbs_refrac

address activity to sector mapping discrepancies for water FBS