Doesn't capture coverage on imports made via conftest.py

Issue #12 new
Anonymous created an issue

There are a number of reports of pytest-cov missing coverage for imports when they happen via a contest.py: http://stackoverflow.com/questions/16404716/using-py-test-with-coverage-doesnt-include-imports

This makes it difficult to get close to the 100% code-coverage desired when using this with py.test.