Evaluate and enforce data file versioning

[nugget]

The top section of each Road Trip CSV data file contains a block that advertises the file's version, language, and CSV delimiter values. We currently do not parse or utilize the file version number.

We should extract this version number from the file and return an error if the user is attempting to parse an unsupported file version with the package.

The package should be aware of version numbers and refuse to process an unsupported version number.