modify import mails, wip
mailer: import: cases
Merge branch 'master' of github.com:CartoDB/cartodb
mailer: import
mailer:s import: add errors
mail notifier: fix notifier config
move helper to its own import mailer
mailer: import: remove callback
mailer: import: inherit from app
tests: mailer: fix tests
Renamed TESTING to TESTING.md

Suggested by @knownasilya
Updated NEWS.md
Merge remote-tracking branch 'origin/master' into CDB-3949
Merge pull request #870 from CartoDB/CDB-3949

Improve emails upon import completion
Update NEWS.md
Merge branch 'master' of github.com:CartoDB/cartodb into CDB-4407