Add CMS features in readme

[ananyo2012]

When you launch the website via localhost:8000 it shows a blank white page. So you become clueless about what should be done. A proper description of the features should be written down along with how to create an admin user.

[ananyo2012]

These are the present pages

1. About page
2. Events page
3. Login Page
4. Contact
5. Sponsors

Command to create an admin is python manage.py createsuperuser

[ghoshbishakh]

I think these informations should go to a documentation.
Let us make a doc folder and add these info.

[nkprince007]

@ghoshbishakh, I think we should automate docs, because in the long run. It's gonna be a tedious job to do so.

[ghoshbishakh]

@nkprince007 well docs cannot be automated. We can just use sphinx or something to build a site from docs automatically. You have to write documentation any way.