Fix requirements.txt ref=[#137599137]

requirements.txt

@@ -1,42 +1,30 @@
-alabaster==0.7.9
-Babel==2.3.4
-bleach==1.5.0
-Django==1.9.12
-django-appconf==1.0.2
-django-bootstrap-breadcrumbs==0.8.2
-django-bower==5.2.0
-django-compressor==2.1
-django-cors-headers==2.0.0
-django-filter==1.0.1
-django-formtools==1.0
-django-mobile==0.7.0
-django-recaptcha==1.2.0
-django-sortedm2m==1.3.3
-django-tastypie==0.13.3
-djangorestframework==3.2.5
-docutils==0.13.1
-easy-thumbnails==2.3
-fitbit==0.2.4
-funcsigs==1.0.2
-html5lib==0.9999999
-icalendar==3.11.2
-imagesize==0.7.1
-invoke==0.14.0
-Jinja2==2.9.4
-MarkupSafe==0.23
-oauthlib==2.0.1
-olefile==0.44
-pbr==1.10.0
-Pillow==4.0.0
-Pygments==2.1.3
-python-dateutil==2.4.2
-python-mimeparse==1.6.0
-pytz==2016.10
-rcssmin==1.0.6
-reportlab==3.3.0
-requests==2.12.4
-requests-oauthlib==0.7.0
-rjsmin==1.0.12
-six==1.10.0
-snowballstemmer==1.2.1
-Sphinx==1.5.1
+#
+# Requirements for wger for production
+#
+
+Django>=1.9,<1.10
+django-recaptcha
+reportlab
+django_mobile
+django-formtools>=1.0,<1.1
+bleach
+python-mimeparse
+pillow
+easy-thumbnails
+django_compressor
+icalendar
+django-bootstrap-breadcrumbs
+sphinx
+django-sortedm2m
+django-bower
+invoke
+requests
+
+# REST API
+djangorestframework>=3.2,<3.3
+django-filter
+django-tastypie
+django-cors-headers
+
+# Python3 compatibility
+six