Merge pull request #870 from intportg/dev

Product display (pictograms and visuals) + fixes
Update Elastica to run with elastic search 1.0. Fix product indexation
Merge pull request #871 from loiccouturier/master

Update Elastica to run with elastic search 1.0. Fix product indexation
Enhance product editor for variant
Merge pull request #872 from loiccouturier/master

Enhance product editor for variant
Handle unlimited inventories in variant stock editor + add links to edit the product and the SKU
Fix visuals in product aside preview.
Enhance variant editor (left menu and disable some screens during variant generation)
Fix comments and code formatting.
Fix grid parameter in page templates
Enhance CrossSellingProductList and ProductListItem routes