relax minor version number

requirements.txt

@@ -1,18 +1,18 @@
-numpy==1.11.0
-biopython==1.66
-Django==1.6.11
+numpy==1.*
+biopython==1.*
+Django==1.6.*
 django-contrib-comments==1.5
 django-filter==0.7
-django-reversion==1.8.0
-django-selectable==0.9.0
-markdown2==2.3.1
-pytz==2016.4
-South==1.0.2
-xlrd==0.9.4
+django-reversion==1.8.*
+django-selectable==0.9.*
+markdown2==2.3.*
+pytz==2016.*
+South==1.0.*
+xlrd==0.9.*
 
-dj-database-url==0.4.0
-gunicorn==19.4.5
-psycopg2==2.6.1
-whitenoise==2.0.6
+dj-database-url==0.4.*
+gunicorn==19.4.*
+psycopg2==2.6.*
+whitenoise==2.0.*
 django-storages==1.4
-boto==2.40
+boto~=2.40