update 2 for requirements

requirements.txt

 Django==1.6.2
+South==0.8.4
 argparse==1.2.1
+django-appconf==0.6
+django-braces==1.3.1
+django-compressor==1.3
+django-floppyforms==1.1.1
+django-haystack==2.1.0
+django-model-utils==2.0.2
+django-pipeline==1.3.21
 djangorestframework==2.3.12
+futures==2.1.6
+python-dateutil==2.2
+six==1.5.2
 wsgiref==0.1.2