Formatting and removing dead code.
More specific error.
Removing lots of `eval()` statements.
Spelling and formatting
Replacing EVTNotImplementedError with generic NotImplementedError.
Added tests to read from BytesIO objects
BytesIO compatible is_evt and test.
Support for reading from file like objects.
Using proper isinstance() checks.
Refactored verify() methods.
Removing another eval() statement
Removing dead code.

Also renamed the internal parameters to stats.kinemetrics_evt.