Update .travis.yml

Composer is now pre-installed in travis.
Added .gitignore

Declaring routing keys in config

Improved phpunit help.

Fixed setupConsumer  issue.
Rename setupQueue to setupFabric.
Fixed CS and remove unused 'use'.
Make Producer methods chainable.
Merge pull request #94 from blaugueux/patch-1

Update .travis.yml
Merge pull request #93 from blaugueux/routingKeysConfig

Declaring routing keys in config. Added gitignore. Improved phpunit help.