Grgrlib

**Full Changelog**: https://github.com/gboehl/grgrlib/compare/0.1.17...0.1.18

**Full Changelog**: https://github.com/gboehl/grgrlib/compare/0.1.16...0.1.17

**Full Changelog**: https://github.com/gboehl/grgrlib/compare/bgs_version...0.1.16


bgs_version
Reference version used for Boehl, Goy & Strobel: "A Struktural Investigation of Quantitative Easing".

The results are exactly replicable with this code.