* a simple generic unction to visualize tensors allowing the copy-past
in other examples

* PrintData was buggy

This fixes the output order of PrintData and supports a constrained
recursion to inspect nested objects. Further, it supports more types
and keeps the output minimal by providing only necessary information
(no shape information for scalars).

* fix doc

* cleanup

* add NVML binding

* fix flake8

* separate gpu and nvml

* remove stuff

* switch to context

* Clean-up and rename

* fix lint

* Use tflayers

* some docs

* Use decorator for argument renaming

* rename parse_args

* Increase GPU counting robustness

Added native Tensorflow method to check number of GPUs.

* docs

* missing import

* fix import

Added dilation_rate to Conv2D since Tensorflow supports it easily. Requires TF 1.5 or greater.