refactoring
more refactor
new files
use sqlalchemy
use sqlalchemy
Delete data_manager.py
Delete data_manager.py
Merge branch 'master' of https://github.com/random-walk/Trade-Analysis-Python-
Merge branch 'master' of https://github.com/random-walk/Trade-Analysis-Python-
adding back data_manager
Merge branch 'master' of https://github.com/random-walk/Trade-Analysis-Python-