fix import issues and clean code

v0.8.8-beta

fix tkinter issue

v0.8.7-beta - Port to Python3 and fix minor issues

fixed lower case atom name issue

v0.8.6-beta: Merge pull request #5 from aloctavodia/master

reorder folders (necessary for automatic installation)

v0.8.5-beta: fix templates: reorder atoms, standarize nomenclature and minimize co…

…nformations

v0.8.1-beta

fix error when adding ramifications

v0.8-beta

fix ramachadran by state