Add beautifulsoup v4.3.2

Why? This python pkg is a required dependenecy for django-webtest.
Add webtest v2.0.15
Add django-webtest library 1.7.7
Add WebOb v1.4

Why? It's a required dependency of django-webtest.
Replace twill tests with django-webtest in account tests
Delete 1 account test for a failure that cannot be confirmed locally
Replace twill tests with django-webtest in customs tests