Cannot import pandas after update of conda (PyQt4.QtGui import error)
Recently updated conda, using conda update --all. I have conda forge, so I should be using the latest recipes. On attempting to import pandas:

#### Code Sample, a copy-pastable example if possible

```python
import pandas
---------------------------------------------------------------------------
ImportError                               Traceback (most recent call last)
<ipython-input-3-d6ac987968b6> in <module>()
----> 1 import pandas

/home/auerilas/anaconda3/lib/python3.5/site-packages/pandas/__init__.py in <module>()
     56 
     57 from pandas.util._print_versions import show_versions
---> 58 from pandas.io.api import *
     59 from pandas.util._tester import test
     60 import pandas.testing

/home/auerilas/anaconda3/lib/python3.5/site-packages/pandas/io/api.py in <module>()
      6 
      7 from pandas.io.parsers import read_csv, read_table, read_fwf
----> 8 from pandas.io.clipboard.clipboard import read_clipboard
      9 from pandas.io.excel import ExcelFile, ExcelWriter, read_excel
     10 from pandas.io.pytables import HDFStore, get_store, read_hdf

/home/auerilas/anaconda3/lib/python3.5/site-packages/pandas/io/clipboard/__init__.py in <modu$
e>()
    101 
    102 
--> 103 copy, paste = determine_clipboard()
    104 
    105 __all__ = ["copy", "paste"]

/home/auerilas/anaconda3/lib/python3.5/site-packages/pandas/io/clipboard/__init__.py in deter$
ine_clipboard()
     74             pass
     75         else:
---> 76             return init_qt_clipboard()
     77 
     78         if _executable_exists("xclip"):

/home/auerilas/anaconda3/lib/python3.5/site-packages/pandas/io/clipboard/clipboards.py in init
_qt_clipboard()
     47 def init_qt_clipboard():
     48     # $DISPLAY should exist
---> 49     from PyQt4.QtGui import QApplication
     50 
     51     # use the global instance if it exists

ImportError: No module named 'PyQt4.QtGui'
```

I can run this following:

```
In [14]: import PyQt5
In [15]: import PyQt4
In [16]: import PyQt5.QtGui
In [17]: import PyQt4.QtGui
---------------------------------------------------------------------------
ImportError                               Traceback (most recent call last)
<ipython-input-17-43468025f39e> in <module>()
----> 1 import PyQt4.QtGui

ImportError: No module named 'PyQt4.QtGui'
```

Any thoughts on how to proceed from here?