Merge pull request heroku#305 from heroku/blacklist-lang

test and implementation for blacklisting LANG; fixed failure tests

Merge pull request heroku#296 from heroku/fiznool-master

Fiznool master

changelog for v88

changelog v87

v86 changelog

changelog piped output buffer fix

changelog sed replacement

v83 changelog

Merge pull request heroku#267 from heroku/detect-errors

Detect errors

Merge pull request heroku#265 from heroku/performance-l

Performance L