Move Rety logic from Consumer to middleware.
Add factory
Merge pull request #68 from henrikbjorn/retry-middleware

Retry middleware
Add factory and test LoggerFactory and LoggerMiddleware
Remove unused variable
functions.php instead of Utils static class
Add changelog for factories
Move Envelope to main Bernard namespace
Merge pull request #70 from henrikbjorn/rename-envelope

Rename envelope
Rename on prefix for method calls
Merge pull request #71 from henrikbjorn/remove-on-prefix

Rename on prefix for method calls
Fix left over from removing failed option
Make it possible to overwrite the failed queue name
update examples with on prefix and remove failed queue options