GitLab

Formatting and dummy code for geometry functions. For trajectory/tecplot format we should do things a little different.

Made tecplottools.apply_equations more robust, anticipated some different formats in equations files

- Google style docstrings use `Args:` and not `Arguments:`
- Stick to markdown *everywhere*.
- The first line in a big docstring `"""` is always a one line summary

Please confirm before I merge :).