Decouple data from functionality

[DorianGreen]

In large deployments it is often unfeasible to mass update a library and deploy changes in order to get data updates.
If each application in an environment is left to update and deploy in its own cadence we risk data consistency issues.

As part of the Initialize method discussed in #135 it would be great if we could pass an optional custom DataLoader( or a folder path) to load the resources from external sources.
You would always fall back to the embedded versions if any file is missing.