Promote new stable 0.9.0

Typo fix on server documentation

Typo fix.

Promote to v0.7.0 stable

Emergency release to fix stale state on parser

Promote 0.4.3-dev to 0.5.0-stable

Promote to 4. stable

Release 0.4.1 stable preparation

Update release version

Tagging stable release

Tag 0.2.1 stable release.