PowerGenome/PowerGenome: v0.5.0

This is a major release focused on making PG outputs compatible with the open-source version of GenX. It also includes a number of other features and bug fixes.

In addition to the PRs listed below, some of the major features are:

• Add a second example system
• Improve example system documentation and change parameters for use with ATB2021
• Add a link to the wiki, where system documentation is being added
• Document how to use the newest version of PUDL data and keep data/code versions compatible
• Improve the settings file checks to catch common setup mistakes

• Genx mod by @aneeshamanocha in https://github.com/PowerGenome/PowerGenome/pull/113
• Fix the CapRes in the network.csv file by @xuqingyu in https://github.com/PowerGenome/PowerGenome/pull/133
• Check all new techs against cost mult map by @gschivley in https://github.com/PowerGenome/PowerGenome/pull/132
• Start fuel fix by @gschivley in https://github.com/PowerGenome/PowerGenome/pull/138
• GitHub ci by @gschivley in https://github.com/PowerGenome/PowerGenome/pull/146
• Accept resource groups with sub_region under IPM by @gschivley in https://github.com/PowerGenome/PowerGenome/pull/148
• Add existing dg as resources by @gschivley in https://github.com/PowerGenome/PowerGenome/pull/135
• Update for open-source GenX and bug fixes by @gschivley in https://github.com/PowerGenome/PowerGenome/pull/147
• Fix startup fuel bug for existing gens by @gschivley in https://github.com/PowerGenome/PowerGenome/pull/137

• @aneeshamanocha made their first contribution in https://github.com/PowerGenome/PowerGenome/pull/113
• @xuqingyu made their first contribution in https://github.com/PowerGenome/PowerGenome/pull/133

Full Changelog: https://github.com/PowerGenome/PowerGenome/compare/v0.4.3.1...v0.5.0