Move the product model breadcrumb from application top 

Move the product model breadcrumb from application top to product_info.php removing a redundant query
Add bredcrumb to product_info.php page

avoids +1 query in application top
Fix add breadcrumb only if product exists
Revert "Fix add breadcrumb only if product exists"

This reverts commit a2017a5a8236e22b19139cd831bf6d0115f7acd9.
Add products model to the breadcrumb only if product model exists
Merge pull request #201 from acidvertigo/patch-12

Move the product model breadcrumb from application top