Developer docs mentioned Redis as a requirement without distinguishing
between local development (where you install it yourself) and Docker
deployment (where it is bundled and managed by supervisord). This caused
confusion for a user who set up an external Redis server not realizing
the Docker image already includes one.
Closes#241
* Bug fix and some documentation improvements.
* Addd model diagrams.
* Documentation Updates and DB utility scripts added.
* Updated documentation.
* Documentation refinements.
* Added new screenshot images and updated docs.
* Added linkk to helper data export scripts.
