Done order cancellation.
Done email sending for placing and cancelling order.
Done provider orders history, view orders.
Fixed provider order list view.
Provider/buyer share same order history/view order template.
Added dropdown for order status/payment status in  provider view order.
Updated buyer browse stores links.
Resolved merge conflict
refs None.
Merge remote-tracking branch 'origin/master'
refs None, fixed 'View Store' button link in product details page.