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### Contributors

- rmcar17 identified and fixed a bug 🚀!
- rmcar17 addressed deprecation of using `end` as a column name


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### BUG

- The saving of numpy arrays in annotation db's was not cross-platform
  compatible due to differences in default types between OS's. Fixed by
  using numpy.save and numpy.load. A warning is raised if an old style
  format is detected and a function provided for updating the format.


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### Deprecations

- `end` is a SQL keyword and so should be avoided. It is now replaced
  by `stop`. Annotation db's with the old column name are dynamically
  updated.

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