Refactor editor.js

[alguerre]

Problems in code v0.1.3

• An API call to get the links is needed when all these data are present in segments.
• Re-do links when removing one segment is too time-comsuming.
• The manage_track_names function take too much responsability on removal segments.

Why to do a full refactor?

• It is a module which must be expanded
• Bug solving takes too much time
• Performance improvements are needed, current naive approaches has drive to a coupled code.

Solution

• Create a proper data structure to store tracks, map, chart and links.
• Make these structures global, at each point no two different methods needs to have simultaneous access.