Remove lib/ directory from .gitignore.
Add *.egg-info directories to the .gitignore.
Add pylint persistent report files to the .gitignore.
Add git mergetool backup and save files to the .gitignore.
Change bridge-descriptors entry in .gitignore to fuzzy match filenames.
Add cached-extrainfo files to .gitignore.
Merge branch 'hotfix/5332-lib-gitignore'