add webtest and django-webtest to requirements.txt
add webtest and django-webtest to requirements.txt

FreedomCoop/valuenetwork,valnet/valuenetwork,valnet/valuenetwork,valnet/valuenetwork,simontegg/valuenetwork,simontegg/valuenetwork,thierrymarianne/valuenetwork,django-rea/nrp,django-rea/nrp,thierrymarianne/valuenetwork,thierrymarianne/valuenetwork,FreedomCoop/valuenetwork,FreedomCoop/valuenetwork,simontegg/valuenetwork,FreedomCoop/valuenetwork,thierrymarianne/valuenetwork,django-rea/nrp,django-rea/nrp,valnet/valuenetwork,simontegg/valuenetwork