Settings class

[Maximellerbach]

Have a way to store values and fetch them when needed. For performance issues, we won't use a dict but rather a class (obviously we won't add settings on the go).

Needs:

• [x] Defaults values
• [x] A way to generate a json file from those default values
• [x] A way to load values from a json file (for exemple at startup)
• [ ] A way to change those values using a string (kind of like you would do with a dict but in a class)

[Maximellerbach]

getattr and setattr will do the job