Add VisualBERT demo notebook (#12263)

* Initialize VisualBERT demo

* Update demo

* Add commented URL

* Update README

* Update README

examples/research_projects/visual_bert/requirements.txt

@@ -0,0 +1,98 @@
+appdirs==1.4.3
+argon2-cffi==20.1.0
+async-generator==1.10
+attrs==20.2.0
+backcall==0.2.0
+CacheControl==0.12.6
+certifi==2020.6.20
+cffi==1.14.2
+chardet==3.0.4
+click==7.1.2
+colorama==0.4.3
+contextlib2==0.6.0
+cycler==0.10.0
+datasets==1.0.0
+decorator==4.4.2
+defusedxml==0.6.0
+dill==0.3.2
+distlib==0.3.0
+distro==1.4.0
+entrypoints==0.3
+filelock==3.0.12
+future==0.18.2
+html5lib==1.0.1
+idna==2.8
+ipaddr==2.2.0
+ipykernel==5.3.4
+ipython
+ipython-genutils==0.2.0
+ipywidgets==7.5.1
+jedi==0.17.2
+Jinja2>=2.11.3
+joblib==0.16.0
+jsonschema==3.2.0
+jupyter==1.0.0
+jupyter-client==6.1.7
+jupyter-console==6.2.0
+jupyter-core==4.6.3
+jupyterlab-pygments==0.1.1
+kiwisolver==1.2.0
+lockfile==0.12.2
+MarkupSafe==1.1.1
+matplotlib==3.3.1
+mistune==0.8.4
+msgpack==0.6.2
+nbclient==0.5.0
+nbconvert==6.0.1
+nbformat==5.0.7
+nest-asyncio==1.4.0
+notebook==6.1.5
+numpy==1.19.2
+opencv-python==4.4.0.42
+packaging==20.3
+pandas==1.1.2
+pandocfilters==1.4.2
+parso==0.7.1
+pep517==0.8.2
+pexpect==4.8.0
+pickleshare==0.7.5
+Pillow>=8.1.1
+progress==1.5
+prometheus-client==0.8.0
+prompt-toolkit==3.0.7
+ptyprocess==0.6.0
+pyaml==20.4.0
+pyarrow==1.0.1
+pycparser==2.20
+Pygments>=2.7.4
+pyparsing==2.4.6
+pyrsistent==0.16.0
+python-dateutil==2.8.1
+pytoml==0.1.21
+pytz==2020.1
+PyYAML>=5.4
+pyzmq==19.0.2
+qtconsole==4.7.7
+QtPy==1.9.0
+regex==2020.7.14
+requests==2.22.0
+retrying==1.3.3
+sacremoses==0.0.43
+Send2Trash==1.5.0
+sentencepiece==0.1.91
+six==1.14.0
+terminado==0.8.3
+testpath==0.4.4
+tokenizers==0.8.1rc2
+torch==1.6.0
+torchvision==0.7.0
+tornado==6.0.4
+tqdm==4.48.2
+traitlets
+git+https://github.com/huggingface/transformers.git
+urllib3==1.26.5
+wcwidth==0.2.5
+webencodings==0.5.1
+wget==3.2
+widgetsnbextension==3.5.1
+xxhash==2.0.0