Merge branch 'release/0.8.3'

Merge branch 'hotfix/changelog'

Merge release/0.8.1

Merge with release/0.8.0

Merge pull request Kong#1019 from Mashape/chore/serf

Improving the performance of Serf

chore(rockspec) bump to 0.6.1

Removing print message

version bump

Adding user

Version bump