Fix warnings when building the readthedocs documentation
When using sphinx to build the documentation in the readthedocs repository there are a lot of warnings.
These are caused because:
- Not all the files are included in a
toctree
- The glossary directive has been used to list the modules, and there are multiple definitions for some of the terms. For example Account is defined as "Fundamentals for most accounting needs." and also "Fundamentals for analytic."