Scansessiontool

* reorganized code for better maintainability
* added unit tests for automated testing
* improved documentation
* fixed bug loading default config
* added new application logo

Install with:

python -m pip install -U -i https://test.pypi.org/simple/ --extra-index-url https://pypi.org/simple --pre scansessiontool


Changes:
* reorganized code for better maintainability
* added unit tests for automated testing
* improved documentation

---
Changes from previous dev:
* implement app icon for non-Windows OS

Install with:

python -m pip install -U -i https://test.pypi.org/simple/ --extra-index-url https://pypi.org/simple --pre scansessiontool


Changes:
* reorganized code for better maintainability
* added unit tests for automated testing
* improved documentation

---
Changes from previous dev:
* fix for application icon

Install with:

python -m pip install -U -i https://test.pypi.org/simple/ --extra-index-url https://pypi.org/simple --pre scansessiontool


Changes:
* reorganized code for better maintainability
* added unit tests for automated testing
* improved documentation

---
Changes from previous dev:
* added application icon

Install with:

python -m pip install -i https://test.pypi.org/simple/ --extra-index-url https://pypi.org/simple --pre scansessiontool


Changes:
* reorganized code for better maintainability
* added unit tests for automated testing
* improved documentation

---
Changes from previous dev:
* fixed bug loading default config

* reorganized code for better maintainability
* added unit tests for automated testing
* improved documentation

---
Changes from previous dev:
* fixed bug loading help.txt (for real now)