update raven version for sentry and use unminified version for debug
Change mail subjects: use short name.

CLUB-763 #resolve
Merge pull request #835 from onepercentclub/feature/club-763

Change mail subjects: use short name.
Merge pull request #834 from onepercentclub/feature/update-raven

Update raven version for sentry and use unminified version for debug
Merge remote-tracking branch 'origin/master' into feature/mixpanel-update-28-7
add refactor