raise ImportError( ImportError: C extension: None not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext' to build the C extensions first.

[kalkite]

I'm encountering an ImportError when trying to import expected_error_reduction from modAL. The error message suggests that the version of pandas I have installed is incompatible with the version of numpy I have installed.

To Reproduce
Here's the code I'm running when I encounter the error:

from modAL.expected_error import expected_error_reduction

And here's the full error message and traceback:

raise ImportError(
ImportError: C extension: None not built. If you want to import pandas from the source directory, you may need to run 'python setup.py build_ext' to build the C extensions first.
```