TST: Update travis

Remove unnecesary sudo so testign will use containers
Update pandas testing version to include 0.16

Author: Kevin Sheppard

.travis.yml

@@ -1,10 +1,12 @@
+sudo: false
+
 language: python
 
 env:
   - PYTHON=2.6 PANDAS=0.13.1
   - PYTHON=2.7 PANDAS=0.15.1
   - PYTHON=3.3 PANDAS=0.14.1
-  - PYTHON=3.4 PANDAS=0.15.1
+  - PYTHON=3.4 PANDAS=0.16.2
   - PYTHON=2.7 PANDAS=0.12.0
   - PYTHON=2.7 PANDAS=0.11.0
   - PYTHON=2.7 PANDAS=0.10.1
@@ -16,7 +18,6 @@ matrix:
         - env: PYTHON=2.7 PANDAS=0.10.1
 
 install:
-  - sudo apt-get update
   # You may want to periodically update this, although the conda update
   # conda line below will keep everything up-to-date.  We do this
   # conditionally because it saves us some downloading if the version is

pandas_datareader/wb.py

@@ -2,16 +2,13 @@
 
 from __future__ import print_function
 
-from distutils.version import LooseVersion
-
 from pandas.compat import map, reduce, range, lrange
 from pandas.io.common import urlopen
 from pandas.io import json
 import pandas
 import numpy as np
 import warnings
 
-PD017 = LooseVersion(pandas.__version__) >= LooseVersion('0.16.2')
 # This list of country codes was pulled from wikipedia during October 2014.
 # While some exceptions do exist, it is the best proxy for countries supported
 # by World Bank.  It is an aggregation of the 2-digit ISO 3166-1 alpha-2, and 
@@ -158,8 +155,7 @@ def download(country=['MX', 'CA', 'US'], indicator=['NY.GDP.MKTP.CD', 'NY.GNS.IC
         out = reduce(lambda x, y: x.merge(y, how='outer'), data)
         out = out.drop('iso_code', axis=1)
         out = out.set_index(['country', 'year'])
-        kw = 'numeric' if PD017 else 'convert_numeric'
-        out = out.convert_objects(**{kw: True})
+        out = out.convert_objects(convert_numeric=True)
         return out
     else:
         msg = "No indicators returned data."