Solcore

- Add automatic deployment to PyPi
- Add adding custom materials and access to the refractive index database
- Add an alternative formulation for the detail balance calculation

- Parameters "relative_dielectric_constant" and "dielectric_constant" have been renamed "relative_permittivity" and "permittivity" in the parameter system and solar cell solvers. Changed also in the examples.
- Light holes density of states are now considered in the Depletion Approximation solver by using the ni calculated in the materials system
- The Depletion Approximation solver now checks that the junction is an homojunction
- MORE TO BE ADDED (RAY TRACING, REFRACTIVEINDEX, ETC)
- Added Sunglass, Solcore's graphic user interface

- Updated installation instructions to avoid an error that ocurs when PiP passes the --with_pdd option to all Solcore dependencies.

- Changed the way QWs are solved before using them in a solar cell to avoid problems with not finding the n and k data

- Updated documentation for solar cell solvers
- The *position* option is now set consistently for all optical solvers
- License badge added to the README file
- The Fortran compiler methods have been eliminated, since this is done by distutils, now.
- Eliminated the auto-meshing during the IV calculation of the PDD solver. It was causing inconsistencies.
- Changed name of examples files to be more meaningful
- Corrected an error in light_source.smarts
- Eliminated legacy functions from config_tools
- Added default "pn=True" value to the tunnel junctions
- Added more examples to the Examples page

- Corrected several file names to avoid spaces: all have been replaced by underscores
- Added exe=1 flag in setup.cfg to ensure tests are run, even if they are labelled as executable files.
- Several files adapted to be able to create the documentation in Read the Docs
- Now the default installation does NOT install the PDD solver and, in order to install it, the option --with_pdd must be given.
- Added Examples section in the documentation