Bumped version to 2.8.1
reverted #1405 because it spawned 1451
Merge branch 'hotfix/2.8.1'
Merge pull request #1467 from rgeraads/master

revert #1405 because it spawned #1451
Update changelog with 2.8.1 info
Merge branch 'master' of github.com:phpDocumentor/phpDocumentor2
Merge branch 'master' into develop
Merge branch 'develop' of github.com:phpDocumentor/phpDocumentor2 into develop