Ignore cover_db/.
Add [Common] section in Changes.
Error::Pure::HTTP::JSON: Fix warning with chomp on undefined value. Fix to standard Error::Pure style.
Update MANIFEST file.
Error::Pure::HTTP::JSON: Add basic tests.
Error::Pure::HTTP::JSON::Advance: Fix warning with chomp on undefined value. Fix to standard Error::Pure style.
Error::Pure::HTTP::JSON::Advance: Add basic tests.