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* Rangify STL algorithms

This commit adapts rangified std::copy(), std::fill() & std::transform()

* Re-write more std::copy() calls

* Re-write std::copy() calls in profiler

* 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