rename completion/renaming.py to usages.py
fixed a problem that combined __getattr__ and usages
don't skip doctests in api_classes
clean up some docstrings in api_classes and put them in the right order
first functioning for loop tests, see #283
fix api_classes definition description on flows
namespace package tests, #122
namespace packages first part, fix goto problems
also enable autocompletion on namespace packages, fixes #122
minor bug/testing fixes for #122
fixed a bug in api_classes comparison
more namespace package tests, #122
fix two failed tests due to previous changes