TST: wb test failing
cc @jnmclarty

can you take a look 

```
FSS.S
======================================================================
FAIL: test_wdi_download (pandas.io.tests.test_wb.TestWB)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/Users/jreback/pandas/pandas/util/testing.py", line 1441, in wrapper
    return t(*args, **kwargs)
  File "/Users/jreback/pandas/pandas/io/tests/test_wb.py", line 48, in test_wdi_download
    assert_frame_equal(result, pandas.DataFrame(expected))
  File "/Users/jreback/pandas/pandas/util/testing.py", line 730, in assert_frame_equal
    check_exact=check_exact)
  File "/Users/jreback/pandas/pandas/util/testing.py", line 674, in assert_series_equal
    assert_almost_equal(left.values, right.values, check_less_precise)
  File "das/src/testing.pyx", line 58, in pandas._testing.assert_almost_equal (pandas/src/testing.c:2740)
  File "das/src/testing.pyx", line 93, in pandas._testing.assert_almost_equal (pandas/src/testing.c:1825)
  File "das/src/testing.pyx", line 140, in pandas._testing.assert_almost_equal (pandas/src/testing.c:2572)
AssertionError: expected 39682.47225 but got 39677.30176, with decimal 5

----------------------------------------------------------------------
Ran 5 tests in 7.469s
```
