upgraded django-autoslug to latest version to support 1.8

requirements.txt

@@ -3,7 +3,7 @@ Django==1.8.9
 argparse==1.2.1
 django-allauth==0.20.0
 django-analytical==0.19.0
-django-autoslug==1.7.2
+django-autoslug==1.9.3
 django-braces==1.4.0
 git+https://github.com/kstateome/django-cas.git
 django-crispy-forms==1.4.0