Missing version information in generated Sphinx docs

[ethanholz]

When running the cookiecutter for the first time, the generated Sphinx docs have an empty version and release item. When running the sphinx-quickstart, the release tag is asked and set accordingly. Currently, there is no templated item used to add these fields.

Using sphinx-quickstart the following is generated in the conf.py file:

release = '<whatever you set the version to in the guided quickstart>'

In the current implementation of this project this is generated in the conf.py:

# The short X.Y version
version = ''
# The full version, including alpha/beta/rc tags
release = ''

Ideally, this would be fixed by providing the option for users to specify the version they want to initialize their project with rather than requiring it to being preset to 0.0.0. This creates some level of flexibility for projects that might not want to use semantic versioning but might want to use something like calendar versioning instead. Keeping the default to 0.0.0 is still fine, but the option could be nice. If this is asked during the creation process, templating the the release in the Sphinx docs should be easy to set.

To note, I am interested in contributing this change if the community and project are open to the new functionality/change!