NREL/reV: Minor features

What's Changed moved project-specific batch methods to class attributes so other pro… (#381) @grantbuster renamed the default rev_status.json file to pipeline_status.json to b… (#377) @grantbuster made it so that you can input an explicit list of resource files that… (#376) @grantbuster subclassed outputs from rex. incremented rex version requirement. (#375) @bnb3