Add minimum version for django-dev-server
Add minimum version for django-dev-server

Anything lower than this causes the server to not start with Django
1.5.5 or higher.

qedsoftware/commcare-hq,puttarajubr/commcare-hq,gmimano/commcaretest,qedsoftware/commcare-hq,gmimano/commcaretest,puttarajubr/commcare-hq,SEL-Columbia/commcare-hq,dimagi/commcare-hq,qedsoftware/commcare-hq,dimagi/commcare-hq,puttarajubr/commcare-hq,dimagi/commcare-hq,qedsoftware/commcare-hq,gmimano/commcaretest,SEL-Columbia/commcare-hq,dimagi/commcare-hq,puttarajubr/commcare-hq,qedsoftware/commcare-hq,SEL-Columbia/commcare-hq,dimagi/commcare-hq