PromotionBundle : fixing bug on non existent "equal" configuration
PromotionBundle : fixing bug (usage limit was not checked)
Dispatching events related to coupons Fixing CS and glitches
Handling flash messages related to coupons thanks to SyliusPromotionsEvents. Fixing CS
Fixing specs and CS, cleaning code and tests cleaning after reviews
Fix permissions
Merge pull request #429 from jjanvier/feature/coupons-integration

[WIP] Integrate the promotion coupons
Renaming SalesBundle to OrderBundle