Refactor0

[ghost]

moved most database related stuff to models.py fixed some bugs.

i plan on splitting the project with Blueprints as we discussed, each phase will get each own modules, so it will be easier to work on each one without creating many conflicts between branches. but that will require some restructuring and also the use of a factory function for creating the flask app as it's described in the docs.

[bhark]

All tests pass and everything looks good, thanks!