Update requirements

maint/requirements.txt

@@ -1,5 +1,5 @@
 # Frozen pip requirements for tools used in the development of tornado.
-# This list is for python 3.4; for 2.7 add:
+# This list is for python 3.5; for 2.7 add:
 # - backports.ssl-match-hostname
 # - futures
 # - mock
@@ -7,33 +7,41 @@
 # Use virtualenv instead of venv; tox seems to get confused otherwise.
 
 # Tornado's required dependencies
-certifi==14.5.14
+certifi==2015.9.6.2
 
 # Tornado's optional dependencies
-Twisted==15.0.0
+Twisted==15.4.0
 # pip on python 3.4 currently has trouble installing pycares.
-#pycares==0.6.1
+pycares==1.0.0
 pycurl==7.19.5.1
 
 # Other useful tools
-Sphinx==1.2.3
-autopep8==1.1
-coverage==3.7.1
-flake8==2.3.0
-pep8==1.6.0
-pyflakes==0.8.1
-sphinx-rtd-theme==0.1.6
-tox==1.8.1
-twine==1.4.0
-virtualenv==12.0.7
+Sphinx==1.3.1
+autopep8==1.2.1
+coverage==4.0
+flake8==2.4.1
+pep8==1.6.2
+pyflakes==1.0.0
+sphinx-rtd-theme==0.1.9
+tox==2.1.1
+twine==1.6.2
+virtualenv==13.1.2
 
 # Indirect dependencies
-Jinja2==2.7.3
-MarkupSafe==0.23
-Pygments==2.0.2
+alabaster==0.7.6
+Babel==2.1.1
 docutils==0.12
-mccabe==0.3
+Jinja2==2.8
+MarkupSafe==0.23
+mccabe==0.3.1
 pkginfo==1.2.1
-py==1.4.26
-requests==2.5.1
+pluggy==0.3.1
+py==1.4.30
+Pygments==2.0.2
+pytz==2015.6
+requests==2.7.0
+requests-toolbelt==0.4.0
+six==1.9.0
+snowballstemmer==1.2.0
+wheel==0.24.0
 zope.interface==4.1.2