Update docs requirements.txt file.

docs/requirements.txt

@@ -1,8 +1,12 @@
+alabaster==0.7.10
 attrs==16.0.0
 autobahn==0.15.0
+Babel==2.5.1
 backports.ssl-match-hostname==3.5.0.1
 bcrypt==3.1.0
+certifi==2017.11.5
 cffi==1.7.0
+chardet==3.0.4
 colorama==0.3.7
 coverage==4.1
 cryptography==1.4
@@ -13,34 +17,49 @@ docutils==0.12
 enum34==1.1.6
 funcsigs==1.0.2
 idna==2.6
+imagesize==0.7.1
 incremental==17.5.0
 ipaddress==1.0.16
+Jinja2==2.10
 jsonpatch==1.15
 jsonpointer==1.10
 klein==16.12.0
+MarkupSafe==1.0
 mock==2.0.0
 msgpack-python==0.4.8
 nose==1.3.7
+olefile==0.44
 pbr==1.10.0
+pdfrw==0.4
+Pillow==4.3.0
 psutil==4.3.0
 pyasn1==0.1.9
 pyasn1-modules==0.0.8
 pycparser==2.16
+Pygments==2.2.0
 PyJWT==1.5.3
 pyOpenSSL==16.0.0
+pytz==2017.3
 PyYAML==3.11
+reportlab==3.4.0
 requests==2.15.1
+rst2pdf==0.93.dev0
 service-identity==16.0.0
 six==1.10.0
 smokesignal==0.7.0
+snowballstemmer==1.2.1
 Sphinx==1.3.1
+sphinx-rtd-theme==0.1.9
 sphinxcontrib-httpdomain==1.5.0
 sphinxcontrib-jsonschema==0.9.3
+sphinxcontrib-websupport==1.0.1
 Twisted==16.2.0
 txaio==2.5.1
 txdbus==1.0.13
 txmsgpackrpc==1.1
 txsockjs==1.2.2
+typing==3.6.2
+urllib3==1.22
 websocket-client==0.37.0
 Werkzeug==0.12.2
 wget==3.2