try to import py3ks cookiejar, use cookielib as fallback.
Use relative imports for test modules.
decode byte-strings to unicode.
use newer Flask-SQLAlchemy.
wrap `view`-Instances in list().
discover unittests.
disable py2.6 tests, add py3.4 instead.

Tests against Python 2.6 were broken anyways:
https://travis-ci.org/aromanovich/flask-webtest/jobs/25311535
Merge pull request #6 from hansenerd/py3k-compatibility

Py3k compatibility