Create structure of project

Project should has comfort for development and maintaining structure as python module; In my opinion this looks good:

├── READMEs
├── LICENSE
├── other_stuff..
└── tasktree
    ├── __init__.py
    ├── __main__.py
    ├── core
    │   └── __init__.py
    ├── cli
    │   ├── files_implemented_cli .py
    │   └── __init__.txt
    ├── store
    │   ├── files_for_save_&_load.py
    │   └── __init__.txt
    └── [optional_modules]
        ├── _and_its_files.py
        └── __init__.txt

Chauss-LLC / task_tree_local

Create structure of project #4