Add sphinx docs

[ntadimeti]

• Add sphinx documentation support
• Currently only supports readme and tutorials.

[ntadimeti]

In order to add more pages to the webpage: run pip install requirements-base.txt to install sphinx dependencies 1) cd docs 2) Create a new md file inside docs/ dir 3) vi index.rst 4) Add your file name under:

   :maxdepth: 2

   readme
   pretrained_models
   tutorials/tutorial1
   tutorials/tutorial2
   Dockerfile
   <your file name wihtout the .md>

5) Build the html files using sphinx-build -b html ./ build

In order to view the html pages: 1) Clone the branch 2) cd docs/build 3)google-chrome index.html

[ntadimeti]

• [todo] Need to add more documentation
• [todo] add API documentation as help
• [todo] Clean up the docs
• [todo] Create a public https

The above todo's will be done as new PRs -- collaborating with Avantika Lal on this.