Merge pull request networkit#783 from fabratu/fix-compiler-search

setup.py: Fixes error when trying to find suitable compiler

Bump version 8.1

Bump version 8.1

Merge pull request networkit#642 from fabratu/bump-80

Version 8.0: Readme + version update

Bump version 7.1

Merge pull request networkit#558 from fabratu/fix-ctd

Fix: Commute Time Distance

Bump version to 6.1

Bump version 6.0.1

MANIFEST: Fix distributed files in 6.0 release

Bump version to 5.0

Bumped version to 4.6