Fix import error

http://ask.lisa-project.net/5/lisa-cli-createsuperuser-give-importerror

Author: Seraf

requirements.txt

@@ -5,7 +5,7 @@ Twisted>=13.2.0
 pymongo>=2.7
 requests>=2.2.1
 django-tastypie>=0.11.0
--e git://github.com/Seraf/django-tastypie-mongoengine.git#egg=django-tastypie-mongoengine
+django-tastypie-mongoengine>=0.4.6
 django-tastypie-swagger>=0.1.2
 pytz>=2014.2
 pyOpenSSL