test failures from test_sqlite

Hello,

I was trying to run odo on Debian and when I have sqlalchemy installed it triggers test failures in test_sqlite.py.

Attached are the build logs and my first pass at patching them. I think the fix in csv.py is probably a good idea. I'm not sure how the header was supposed to be removed in the header=False case, and lastly the change from returning u'' to None seems fairly arbitrary.

Diane

Start with the attached build logs and patch, then inspect test_sqlite.py and csv.py to identify the failures when SQLAlchemy is installed. Clarify the expected behavior for header=False and for returning u'' versus None, then run test_sqlite.py with SQLAlchemy installed; done means those failures are resolved.

Written by the indexing model from the issue text.