setup: add project URLs

The changelog is removed from the long description because it was
causing an error when uploading to pypi. Additional URLs are helpful
too.

Merge pull request hbldh#592 from hbldh/release/0.12.1

Release/0.12.1

Merge pull request hbldh#575 from hbldh/release/0.12.0

Release v0.12.0

Merge pull request hbldh#486 from hbldh/release/0.11.0

Release/0.11.0

Merge pull request hbldh#391 from hbldh/release/v0.10.0

Release/v0.10.0

Merge pull request hbldh#348 from hbldh/release/v0.9.1

Release/v0.9.1

Merge pull request hbldh#340 from hbldh/release/0.9.0

Release/0.9.0

Merge pull request hbldh#303 from hbldh/release/v0.8.0-2

A follow up changed, pre-release of version 0.8.0.

Merge pull request hbldh#245 from hbldh/release/v0.7.1

Release/v0.7.1

Merge pull request hbldh#232 from hbldh/release/v0.7.0

Release of version 0.7.0 of bleak.