* Improve example reusability
* Remove no-longer used file
* Rename folder of grouped_conv_bwd_data example
* Add normal grouped conv bwd example
* Add interface 'DeviceGroupedConvBwdData'
* Prettify comment of device op type arguments
* Add grouped conv2d/conv3d backward data fp16 instances
* Fix wrong template argument
* Add grouped_conv2d_bwd_data client example
* Use simpler expression to calculate memory size
* Fix formating
* Remove grouped_conv3d_bw_data instances
Underlying device operator is not ready to handle 3D input
* Remove no-longer necessary include directive
* Add missing include directive
* Use more realistic conv param in example