NREL/reV: reV 0.8.0

This is a major update to port reV onto GAPs. It includes breaking changes to the API and CLI. Features/Updates reV on GAPs (#415) @ppinchuk Other Custom Drill Costs for Geothermal (#417) @ppinchuk Solar AC capacity outputs (#416) @ppinchuk added better parsing for windspeed and winddirection variables in the… (#414) @grantbuster Bespoke Updates (#410) @ppinchuk missed python version increment in install instructions (#409) @bnb32 Gb/bespoke gen (#407) @grantbuste