Add Natural Engine config file load and save

Registered by Sergio Tortosa

Natural Engine games need a file where they can save their own config. There are two ways of doing this:
-Use a library
-Use Ogre's config
The later seems to be the best, that way we only have one file and we save one dependence .

Blueprint information

Status:
Not started
Approver:
None
Priority:
Medium
Drafter:
None
Direction:
Needs approval
Assignee:
Sergio Tortosa
Definition:
Approved
Series goal:
None
Implementation:
Unknown
Milestone target:
None

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