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[NULLx76]

Regarding #121, #122

Mostly done, still expect to make some changes.

• Currently, the state.json has a different file format, can easily be changed.
• The data directory is currently hard coded to ./data_new for testing
• I have not yet ran it long enough to test for the rate limits
• Add some nicer error messages instead of just using ? everywhere
• Add a few more doc comments around the place