Catalog promotion plugins

[gabiudrescu]

https://github.com/URBANARA/UrbanaraCatalogPromotionPlugin
https://github.com/Snake-Tn/SyliusCatalogPromotionPlugin

two competing plugins :)

[bitbager]

Actually, as far as I remember the first one has been implemented during CodingBerlin hackathon and it has not been finished. Am I right @klederson, @marcelsud?

[gabiudrescu]

Catalog promotion init
lchrusciel committed on Mar 3, 2017

https://github.com/URBANARA/UrbanaraCatalogPromotionPlugin/commit/0b9db4c69d5f0b65c0fcf75ac7f33e89aab20fbc

Sylius/Sylius#7977 (comment)