77 pypi prep

[andressl91]

Related to #77, I want to suggest some minor improvements to the structure of the repository.

Currently all sourcecode is located in the src/ directory, meaning from the current setup.py, a python package structure of sortphotos will look something like this in site-packages.

(sortphotos) [flex@jackal]: ~/sandbox/foo/sortphotos>$ ls lib/python3.8/site-packages/
_distutils_hack/          pip-20.2.4.virtualenv         setuptools-50.3.2.virtualenv  _virtualenv.py
distutils-precedence.pth  pkg_resources/                sortphotos/                   wheel/
easy_install.py           __pycache__/                  sortphotos-1.0.dist-info/     wheel-0.35.1.dist-info/
pip/                      setuptools/                   src/                          wheel-0.35.1.virtualenv
pip-20.2.4.dist-info/     setuptools-50.3.2.dist-info/  _virtualenv.pth
(sortphotos) [flex@jackal]: ~/sandbox/foo/sortphotos>$ tree src/ -d
src/
├── Image-ExifTool
│   └── lib
│       ├── File
│       └── Image
│           └── ExifTool
│               ├── Charset
│               └── Lang
└── __pycache__

Renaming src to sortphotos we get

(sortphotos) [flex@jackal]: ~/sandbox/foo/sortphotos>$ ls lib/python3.8/site-packages/
_distutils_hack/          pip-20.2.4.virtualenv         setuptools-50.3.2.virtualenv  _virtualenv.py
distutils-precedence.pth  pkg_resources/                sortphotos/                   wheel/
easy_install.py           __pycache__/                  sortphotos-1.0.dist-info/     wheel-0.35.1.dist-info/
pip/                      setuptools/                   src/                          wheel-0.35.1.virtualenv
pip-20.2.4.dist-info/     setuptools-50.3.2.dist-info/  _virtualenv.pth
(sortphotos) [flex@jackal]: ~/sandbox/foo/sortphotos>$ tree sortphotos -d
sortphotos
├── Image-ExifTool
│   └── lib
│       ├── File
│       └── Image
│           └── ExifTool
│               ├── Charset
│               └── Lang
└── __pycache__

To run the sortphotos.py more neatly, I have also proposed to add a main.py in module entry folder (sortphotos).
In the current setup, one has to download the repo and run the module from within.

After creating a wheel or tar package and do pip install, an end user can simply do: python -m sortphotos -h