v0.3

gfit version 0.3. Updated to:

1. run (more slowly) on environments without numba [ see pip install gfit[nonumba] ]
2. expose e.g., hull correction code on environments without scipy.

Default install (pip install gfit) will still install both numba and scipy.

Full Changelog: https://github.com/samthiele/gfit/commits/v0.3