Now everything is in Core/Config

Eventually, Settings will be removed

While doing this, I have also fixed a bug in the current implementation
of ThrowAll (formerly named `throwAll'`).

This commit moves `GargConfig` and the other config-related
data structures back into gargantext, so that they can be edited
and expanded without needing to worry about the prelude project.

Also, some fixes to NodeStory (it inserts ngrams when saving node
story, when they don't exist).