Added open graph type function to set products to type 'product'. Allow specifying a minimum size the open graph image must be.
Added open graph type function to set products to type 'product'.
Allow specifying a minimum size the open graph image must be.

markguinn/silverstripe-shop,bummzack/silverstripe-shop,StephenHonor/silverstripe-shop,burnbright/silverstripe-shop,webtorque7/silverstripe-shop,mediabeastnz/silverstripe-shop,burnbright/silverstripe-shop,webtorque7/silverstripe-shop,hailwood/silverstripe-shop,burnbright/silverstripe-shop,StephenHonor/silverstripe-shop,markguinn/silverstripe-shop,hailwood/silverstripe-shop,hailwood/silverstripe-shop,bummzack/silverstripe-shop,markguinn/silverstripe-shop,hpeide/silverstripe-shop,webtorque7/silverstripe-shop,StephenHonor/silverstripe-shop,silvershop/silvershop-core,mediabeastnz/silverstripe-shop,mediabeastnz/silverstripe-shop,bummzack/silverstripe-shop