Restore pinned versions in setup.py for now.

Without pinned requirements, we end up installing
incompatible versions of MarkupSafe and Jinja2. See
#63 (review)

For now, restore the pinned version before 47bc80b to unblock
workflows using setup.py.

Author: fhahn

setup.py

@@ -115,21 +115,24 @@
         ],
     },
     install_requires=[
-        "aniso8601",
-        "certifi",
-        "click",
-        "Flask-RESTful",
-        "Flask-WTF",
-        "Flask",
+        "six",
+        "aniso8601==1.2.0",
+        "Flask==0.12.2",
+        "Flask-RESTful==0.3.4",
         "Jinja2",
-        "MarkupSafe",
-        "python-gnupg",
+        "MarkupSafe==1.1.1",
+        "SQLAlchemy==1.3.24",
+        "Werkzeug==0.15.6",
+        "itsdangerous==0.24",
+        "python-gnupg==0.3.7",
+        "pytz==2016.10",
         "pyyaml",
-        "requests",
-        "SQLAlchemy",
+        "WTForms==2.0.2",
+        "Flask-WTF==0.12",
         "typing",
-        "Werkzeug",
-        "WTForms",
+        "click==6.7",
+        "requests",
+        "certifi"
     ],
 
     ext_modules=[cPerf],