New Complex Systems mode (experimental), new documentation and better docstrings.
This is the last version for the following weeks.

Several optimizations in UI, configuration, plotting, and utils. Several improvements in messages, transformations and centralization. New magnitudes and statistics.

TODO:

• Include new predefined equations.
• Improve boundary conditions.
• Inclusion of vectorial PDE.
• New mode for complex cases. For example, coupled oscillators, choosing the number of oscillators, the non-linear terms, and other considerations. Each case will have its corresponding visualizations.
• Correction of the documentation.
• Internationalization.

UI Improvements, new boundary conditions included for Dirichlet and transforms of the solutions.

Fixed several bugs, implemented a lot of improvements and fixes in the visualization of the solutions, and better data use. Also, some optimizations have been implemented, and now there are better designs.

Future steps are:

1. Optimize the loading time, and include working windows.
2. Improve the symbols used in the definition of the custom functions, including for example gradient, D'Alembertian and other ones.
3. Include new predefined equations.
4. New mode for complex cases. For example, coupled oscillators, choosing the number of oscillators, the non-linear terms, and other considerations. Each case will have its corresponding visualizations.
5. Adding a correct handling for the contour conditions in the PDE (bugfix).
6. Adding the possibility of transforming the space of the solutions. For example, computing and visualizing the Fourier transform of the solutions or the spaces.
7. Better statistics and magnitudes.
8. Improvement in the UI location of the elements.
9. Inclusion of vectorial PDE.
10. Correction of the documentation.
11. Optimization of the visualizations.
12. Internationalization.

Full Changelog: v0.2.3...v0.3.0