wmwolf/MesaScript: Updates for the GitHub era

This release fixes issues associated with non-numeric version numbers used in MESA since the transition to GitHub. Additionally, it adds out-of-the-box support for the &eos and &kap namelists in mesa star. It still does not automatically support astero projects, though, which is planned for future updates.

Install via gem install mesa_script or update via gem update mesa_script. The gemfile is included in this release as an option for those who have no outside internet access on clusters. I in that case, upload the gem to the computer, and then use gem install mesa_script-0.2.1.gem in the same directory as the gem file.

Full Changelog: https://github.com/wmwolf/MesaScript/compare/v0.2.0...v0.2.1