Added sequence field in product.tree_node #4724

* Use this sequence field to decide display order.

Review ID: 9853003
Merge pull request #13 from aroraumang/feature/task-4724

Added sequence field in product.tree_node #4724
Added field description in product tree node #4736
Merge pull request #14 from goyal1092/feature/task-4736

Added field description in product tree node #4736
Added field image and xml view in product tree node #4735

Review Id: 12863003
Merge pull request #15 from goyal1092/feature/task-4735

Added field image and xml view in product tree node #4735