Update setup.py

Adding a line `description` to `setup.py` so that project not listed as `UNKNOWN` on `pypi`
Merge pull request #26 from lowks/patch-1

Update setup.py
Bump version for release
Merge branch 'release/0.0.2a3'
Merge tag '0.0.2a3' into development

Allow arbitrary ghost depth size for stencil fusion.