Generate data files with flint

[biqqles]

This PR modifies update.py to generate the navmap's data files using flint instead of external tools.

Current progress:

• Dumping string resources
• Generating shortest paths
• Testing

[biqqles]

The initial commit is a small change implementing the generation of infocards.txt with flint instead of FLInfocardIE.exe. The files generated by each are not identical because flint doesn't know how to get resources from DLL 0 (Freelancer.exe). This doesn't matter because these resources are only used in the game's UI and never referenced in INIs but I can improve this if necessary.

[biqqles]

The files generated by each are not identical because flint doesn't know how to get resources from DLL 0 (Freelancer.exe).

I was wrong - these strids are in fact in resources.dll and I've just updated flint to get them too. However, since the majority of resources are not referenced by systems and solars, it might make sense to generate a subset of these to greatly reduce the amount of data downloaded by the client.