Use ExceptionNotifier.notify_exception

This will handle ignored exceptions
Merge pull request #901 from steverandy/master

Use ExceptionNotifier.notify_exception
Add Sidekiq Pro changelog to public repo, for visibility
Update Pro-Changes.md
Recognize current tab with String#starts_with? instead of regexp
Merge pull request #909 from dimko/patch-2

Recognize current tab with String#starts_with? instead of regexp
Fixed ExceptionNotifier test
Merge pull request #910 from dimko/patch-3

Fixed ExceptionNotifier test
Pro changes
More intelligent redis error handling for job fetch
Sidekiq will now shut down successfully if Redis is down.
Add Sidekiq::Actor which provides a testable alternative to Celluloid
Upgrade to Celluloid 0.14, remove defer usage, fixes #919
Switch to threaded tasks, see also celluloid/celluloid#251
Upgrade to Minitest 5
Remove usage of multi_json gem
start_with not starts_with
Merge pull request #920 from espen/start_with

start_with not starts_with
Add slim version check, fixes #889
Update slim version check, #889