Centrosome

Added python 3 support.

* [Neighbor movement tracking](https://github.com/CellProfiler/centrosome/commit/e1dab16d3483a7820da4fd2cb72a855825b31848) by 0x00b1
* [Upgrade numpy 1.13](https://github.com/CellProfiler/centrosome/pull/75) by oleksandr-pavlyk
* [Faster Zernike polynomials](https://github.com/CellProfiler/centrosome/pull/74) by oleksandr-pavlyk

- Fixed NumPy 1.12.0 compatibility issues

- Fixed NumPy 1.12.0 compatibility issues

- use `skimage.filters.median`