Install extras_requires in circle setup.

Author: theengineear

circle/setup.sh

@@ -36,7 +36,7 @@ for version in ${PLOTLY_PYTHON_VERSIONS[@]}; do
     # handle funkiness around python 2.6
     if [ ${version:0:3} == '2.6' ]
     then
-        pip install simplejson ordereddict ||
+        pip install -e '.[PY2.6]' ||
             error_exit "${LINENO}: can't install extras for Python ${version}"
         pip install -r ${PLOTLY_OPTIONAL_REQUIREMENTS_FILE_2_6} ||
             error_exit "${LINENO}: can't install optional for Python ${version}"