Pytest-docfiles

* Features
* skip sections
* exception handling in code sections
* Bugfixes
* fixtures have not been used


main
* Features
* skip sections
* exception handling in code sections
* Bugfixes
* fixtures have not been used

* Features
* run python code sections in markdown
* output readable stack traces
* enable autouse fixtures
* define custom names for code sections
* use explicit defined fixtures
* inject fixtures into code sections
* introduces scopes for dependent code sections