Tfhub object detection improvements (#50)

* Fix Colab's incompatibility w/ Pillow version

* Add %%capture to predict notebook

* Implements os.path.basename() instead of slicing

* Removes auth key

* Adding os.path.basename()

* Improvements at base64 version

* Pillow version update at pip installations

* Parallel processing improvements

* Parallel processing improvements

* Removes Verta's host from os environment

* Changes get_or_create_endpoint() to get_endpoint() on predict notebooks

* Removes Verta's host from os environment

* Removes debug=True parameter in Client()

* Download images with wget to work at Colab

* Remove zip() from executor.map() and adjust results DataFrame

* Merges deploy/predict base64 notebooks

* Merges deploy/predict url notebooks and adjusts folder structure

* Update Colab's badges

* Remove json dependency

* Cleaner code for results in dataframe

* Removes in-class print message

* Changes at ModelAPI args

* Cleanup in Model class and ModelAPI code

* Cleaner code for results in dataframe

* Implements wget instead of urllib.request

* Colab's tested NB

* Colab's tested NB

* Fix model playground.

* Removes unnecessary methods param

* Cleans code to get images urls

* Changes at model describe()

Co-authored-by: Liu <[email protected]>

* Saves image after PIL operations

* Changes predict() to accept lists

* Model input as dict

* Fix example() dict key

* Remove unnecessary nesting at model predictions

Co-authored-by: Liu <[email protected]>