Revert "Added CZI image reader."

This reverts commit 8f0ddecb08cdeb58f2c1e86c22e592f545393f65.
Revert "Added file joe.txt"

This reverts commit 52100b115a0f85cdcc67532c0d00bb9d53d52ce8.
Revert "Revert "Added CZI image reader.""

This reverts commit 939361ae43b0e3030f26a6e62383a8641078479e.
Merge branch 'master' of https://github.com/schryer/python_course_material
Took old version of README.md back from the dead.