ubuntu 13.10 with mpl :  test_hist_df* TypeError: barh() got multiple values for keyword argument 'bottom'
0.15.0

```
======================================================================
ERROR: test_hist_df (pandas.tests.test_graphics.TestDataFramePlots)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/tmp/buildd/pandas-0.15.0/debian/tmp/usr/lib/python2.7/dist-packages/pandas/tests/test_graphics.py", line 2061, in test_hist_df
    axes = df.plot(kind='hist', rot=50, fontsize=8, orientation='horizontal')
  File "/tmp/buildd/pandas-0.15.0/debian/tmp/usr/lib/python2.7/dist-packages/pandas/tools/plotting.py", line 2453, in plot_frame
    **kwds)
  File "/tmp/buildd/pandas-0.15.0/debian/tmp/usr/lib/python2.7/dist-packages/pandas/tools/plotting.py", line 2293, in _plot
    plot_obj.generate()
  File "/tmp/buildd/pandas-0.15.0/debian/tmp/usr/lib/python2.7/dist-packages/pandas/tools/plotting.py", line 920, in generate
    self._make_plot()
  File "/tmp/buildd/pandas-0.15.0/debian/tmp/usr/lib/python2.7/dist-packages/pandas/tools/plotting.py", line 1949, in _make_plot
    artists = plotf(ax, y, column_num=i, **kwds)
  File "/tmp/buildd/pandas-0.15.0/debian/tmp/usr/lib/python2.7/dist-packages/pandas/tools/plotting.py", line 1929, in plotf
    bottom=bottom, **kwds)
  File "/usr/lib/pymodules/python2.7/matplotlib/axes.py", line 8180, in hist
    color=c, bottom=bottom)
TypeError: barh() got multiple values for keyword argument 'bottom'
```

```
NSTALLED VERSIONS
------------------
commit: None
python: 2.7.5.final.0
python-bits: 64
OS: Linux
OS-release: 3.2.0-4-amd64
machine: x86_64
processor: x86_64
byteorder: little
LC_ALL: C
LANG: C

pandas: 0.15.0
nose: 1.3.0
Cython: 0.19
numpy: 1.7.1
scipy: 0.12.0
statsmodels: 0.5.0
IPython: None
sphinx: 1.1.3
patsy: 0.3.0
dateutil: 1.5
pytz: 2012c
bottleneck: None
tables: 2.4.0
numexpr: 2.0.1
matplotlib: 1.2.1
openpyxl: 1.7.0
xlrd: 0.9.2
xlwt: 0.7.4
xlsxwriter: None
lxml: None
bs4: 4.2.0
html5lib: 0.95-dev
httplib2: None
apiclient: None
rpy2: None
sqlalchemy: None
pymysql: None
psycopg2: None
```
