Update README.md

Added reporting messages for loading pull requests and commits

Added safety measures for pattern extractions

Old plots are now deleted when the new ones are generated

Added some report messages

Fixed credentials argument helper

Fixed helper for credentials argument

Returned back commits counting as revisions

Added annotation for NoEscape return value

Added type annotation for "issue"

Added return type annotation for __load_pull_requests

Added an extra comment

Added documentation

Removed files created for testing purposes

Added documentation for report generator