Earthing

- Add support for multiple disjoint earthing networks.
- Refactored code for allowing finer indiscretion and faster execution times.
- Compared simulation results with standard test results and found to be comparable in accuracy.
- Bug fixes

Refactor code to allow finer descretisation and larger grid spacing without memory overflow.

Bug fix release

Initial release for package

Features

- Earth grid design as per IEEE 80/ ENA_ER_S34
- Numerical earth network calculations using using boundary descretisation method.
- Evaluation of earth resistance of various earth electrode geometries.
- 3D plotting of electrode geometry used for design.
- 3D plotting of current density distribution for the earth network.
- 2D/3D plotting of surface potential distribution.
- Ploting and evaluation of mesh and step potentials.