Use statistics backport

requirements.txt

@@ -1,4 +1,5 @@
 backports.csv; python_version < '3.0'
+statistics; python_version < '3.0'
 odfpy
 openpyxl>=2.4.0
 pandas

setup.py

@@ -36,6 +36,7 @@
     'odfpy',
     'openpyxl>=2.4.0',
     'backports.csv;python_version<"3.0"',
+    'statistics;python_version<"3.0"',
     'xlrd',
     'xlwt',
     'pyyaml',

tablib/compat.py

@@ -17,7 +17,6 @@
     from io import BytesIO
     from io import StringIO
     from tablib.packages import markup3 as markup
-    from statistics import median
     from itertools import zip_longest as izip_longest
     import csv
     import tablib.packages.dbfpy3 as dbfpy
@@ -29,7 +28,6 @@
     from cStringIO import StringIO as BytesIO
     from StringIO import StringIO
     from tablib.packages import markup
-    from tablib.packages.statistics import median
     from itertools import izip_longest
     from backports import csv
     import tablib.packages.dbfpy as dbfpy

tablib/formats/_rst.py

@@ -8,8 +8,9 @@
 
 from textwrap import TextWrapper
 
+from statistics import median
+
 from tablib.compat import (
-    median,
     unicode,
     izip_longest,
 )