[requires.io] dependency update

requirements.txt

@@ -1,22 +1,22 @@
 Jinja2==2.7.3
 matplotlib==1.4.2
-requests==2.4.3
+requests==2.5.0
 Frozen-Flask==0.11
 unicodecsv==0.9.4
-lxml==3.4.0
-pytz==2014.9
+lxml==3.4.1
+pytz==2014.10
 
 # These are dependencies of the above, but are specificied explicitly in order to pin versions
 Flask==0.10.1
 MarkupSafe==0.23
 Werkzeug==0.9.6
-argparse==1.2.1
+argparse==1.2.2
 itsdangerous==0.24
 mock==1.0.1
 nose==1.3.4
 numpy==1.9.1
 pyparsing==2.0.3
-python-dateutil==2.2
+python-dateutil==2.3
 six==1.8.0
 wsgiref==0.1.2