Json: Rename json folder to csv_json_nodejs less confusing

There are two implementations (one in python, and one in nodejs) to convert csv to JSON object for later front end consumption
Presentation: Merge the latest presentation copy back into the tree

This is the copy we used to present our project at #hackhou
Deprecation: Remove old presentation files, to cause less confusion
Presentation: rename presentation folder to be named "demo"
post-demo: Tidy up the code a little bit Part 1

Project was retrofitted from a movies example into fees demo. So removing some references to movies
post-demo: Tidy up the code a little bit Part 2

Remove additional references to movies/genre