Define asset files

[kosmonet]

Decisions to take:

• Reuse the existing XML file format from the neon engine?
• Use XML or JSON?
• One big file for each asset type, or separate files for each individual asset?
• Folder structure?
• How to deal with different game modules?

[kosmonet]

• Don't reuse the XML file format, see next point.
• Use JSON, it maps much easier to a simple class for game assets.
• Use separate files for each individual asset. A single JSON file might get quite big and complicated to edit manually.

[kosmonet]

• Reuse the flat folder structure from the neon engine for all assets except the maps. Map structure to be defined (#5). Image files to be defined, will depend in part on which 3D engine to use (#16).
• Assets will be overwritten by an asset with the same id in a module that is later in the load order. Map handling to be defined.