Use draw to avoid mutliple declarations
Use draw to avoid mutliple declarations

Otherwise the routes are declared three times.
In addition used the only option to avoid redraw of product resource
links. Probably also solves #58

Fixes #71

macmm/spree_related_products,sunny2601/spree_related_products,macmm/spree_related_products,surfdome/spree_related_products,stevecawdery/spree_related_products,reinaris/spree_related_products,surfdome/spree_related_products,sunny2601/spree_related_products,3drobotics/spree_related_products,reinaris/spree_related_products,spree-contrib/spree_related_products,reinaris/spree_related_products,3drobotics/spree_related_products,3drobotics/spree_related_products,spree-contrib/spree_related_products,sunny2601/spree_related_products,stevecawdery/spree_related_products,macmm/spree_related_products,stevecawdery/spree_related_products,spree-contrib/spree_related_products