Improve package data loading and error handling.
Review Request #7733 — Created Nov. 3, 2015 and submitted
When looking up a package from the repository, we now pass the base path in, helping to ensure the relative URLs are all correct. We also listen for errors in the lookup, and represent that with a more useful exception.
Unit tests pass.
Tool: Pyflakes Processed Files: rbpkg/repository/errors.py rbpkg/repository/package_repo.py Tool: PEP8 Style Checker Processed Files: rbpkg/repository/errors.py rbpkg/repository/package_repo.py