Update Manifest.in to prune venv files

[kclowes]

What was wrong?

When I was releasing, noticed that venv files were getting included. Once this release is out, I'll go through and update other odds and ends - pull in the project template, and update to modern python support.

How was it fixed?

Added the prune command to MANIFEST.in

To-Do

• Clean up commit history

• Add entry to the release notes

Cute Animal Picture

[carver]

Once this release is out, I'll go through and update other odds and ends - pull in the project template, and update to modern python support.

Yup, the template was my only suggestion :)