Movie add form finished (functionnaly).
Add the former 'this' as argument in Promise.then.

When migrating from a callback to a promise, the function called in the
then will loose the 'this' context that could have been set by the
original function. It is the case for sqlite3 callbacks for example.
So 'this' is added as last argument of the then-function.
New objects model and inheritence.

One should use the Class function to create an object/class now.
It handles inheritence the easy way.
You can pass an object to Class (constructed with { ... } syntax), or a
function that returns an object. This function takes the base
constructor and prototype as arguments than you can use as a closure.
The object constructor is defined using the special __init__ function.

This commit contains also the code for saveOrUpdate for Movie.
Movie saving activation.
Removed the unused/old server.js