Merge pull request #229 from vladimir-v-diaz/develop

Improve test coverage for repository_lib.py
Reorder load_signing_key() calls.

The Targets section of the README separated import_rsa_privatekey_from_file() from load_signing_key().  To improve readability, reorder them so that load_signing_key() calls come immediately after the key import method calls.
Add links and Python prompts.
Minor edits to repository_tool.py.