Version 3.0.0

Update version in setup.py

Version 2.4.0

Version 2.3.1

Version 2.3.0

Version 2.2.2

Version 2.2.1

Version 2.2.0

Version 2.1.9

Version 2.1.8

fixes a bug in visualization

- different models than the first caused issues in visualizing
- atom offset corrected while parsing
- closes #89
- slight refactoring