Use the readme as PyPI desctiption
Point tickets to GitHub instead of Lighthouse

Keep into account the numbers reshuffling: Lighthouse bugs with a number
matching a GitHub merge request are shifted ahead.
Added plural version of the tickets role
Fixed excessively strict notices test

Failing with PG 9.4 because it generates other debug messages during the
test run (rehashing catalog cache).
Release notes cleanup before releasing 2.4.5
Added scripts to release and upload docs
Don't need to build the env for a sdist

After 2.5 we are not releasing the html docs in the sdist anymore.
Fix typo in docs