Grid for offer positions
Merge branch 'master' of https://github.com/stiftungswo/DimeFrontendBundle

Conflicts:
	Resources/public/js/dime/app.js
	Resources/public/js/dime/widget/offer/OfferGrid.js
prepare merge
Merge branch 'master' of https://github.com/stiftungswo/DimeFrontendBundle
commit before migration of OfferWidget
Replacing of OnDemandGrid for offer positions by OfferPositionWidget
Merge branch 'master' of https://github.com/stiftungswo/DimeFrontendBundle