v2.9.1-rc0 (nameko#546)

* Update CHANGES

* Pre-release 2.9.1-rc0

v2.9.0 (nameko#545)

* Release 2.9.0

* Update setup.py

v2.9.0-rc0 (nameko#541)

* Preparing release candidate 2.9.0-rc0

* Update CHANGES

* spelling typo

* Update spelling_wordlist.txt

v2.8.5-rc (nameko#525)

* Update CHANGES

* Release 2.8.5

v2.8.4 rc (nameko#513)

* Update CHANGES

* Release 2.8.4

Merge pull request nameko#501 from nameko/restrict-eventlet

Restrict eventlet

Merge pull request nameko#497 from davidszotten/2.8.2-rc

Release 2.8.2

Merge pull request nameko#494 from nameko/v2.8.1rc

v2.8.1rc

Merge pull request nameko#489 from nameko/v2.8.0-rc

v2.8.0 rc

Merge pull request nameko#480 from nameko/v2.7.0-rc

v2.7.0-rc