Bempp-cl v0.2.1
Small patch release with the following fixes:
- A proper error message is now given if Exafmm is not available.
- Numba now does not produce an error message in single-precision.
- Fixed the issue that evaluation points had to be handed over as the correct data type to Bempp.
- VTK Export now does not produce errors
- The Maxwell dieelectric notebook was updated for Bempp-cl 0.2