- [GaffTyper uses type definition from gaff.zft by default](https://github.com/z-gong/mstk/commit/136326fe4a37f7da99219e8c727215b06141d616)
- [Fix liner angle for LammpsExporter](https://github.com/z-gong/mstk/commit/9a251623ecffc4000ce9fb95b4628bba42e5e1fa)
- [Support FF terms: MorseTerm, QuarticBondTerm, QuarticAngleTerm, HarmonicCosineAngleTerm](https://github.com/z-gong/mstk/commit/6750a5aa661bc342fad14ea18547d736164cc8b7)