Add strict requirements for python 2.6. (more)

Though these requirements are unecessary for Python versions after 2.6,
they’re small, harmless libs to import. They ended up being included
in stdlib anyways.

Author: theengineear

requirements.txt

@@ -13,3 +13,7 @@ six==1.8.0
 
 ## timezone definitions ##
 pytz==2014.9
+
+## 2.6 python dependencies ##
+simplejson==3.6.5
+ordereddict==1.1

setup.py

@@ -40,5 +40,9 @@ def readme():
                 'plotly/matplotlylib/mplexporter',
                 'plotly/matplotlylib/mplexporter/renderers'],
       package_data={'plotly': ['graph_reference/*.json']},
-      install_requires=['requests', 'six', 'pytz'],
+      install_requires=['requests',
+                        'six',
+                        'pytz',
+                        'ordereddict',
+                        'simplejson'],
       zip_safe=False)