Can not import matplotlib when launching from non-ascii path 

Can not import matplotlib when launching from non-ascii path. Matplotlib crashes with a UnicodeDecodeError. As far as I can see it is caused by calling os.getcwd and not os.getcwdu when building the path to matplotlibrc.

I could find 4 instances of getcwd in the code base:

	__init__.py(748): fname = os.path.join(os.getcwd(), 'matplotlibrc')
	backends\backend_gtk.py(820): if not path: path = os.getcwd() + os.sep
	backends\backend_gtk3.py(645): if not path: path = os.getcwd() + os.sep
	sphinxext\plot_directive.py(451): pwd = os.getcwd()

Example non-ascii path:

	In [1]: pwd
	Out[1]: u'C:\\python\\external\\\xe5\xe4\xf6'

	In [2]: import matplotlib
	---------------------------------------------------------------------------
	UnicodeDecodeError                        Traceback (most recent call last)
	<ipython-input-2-82be63b7783c> in <module>()
	----> 1 import matplotlib

	C:\Python27-64\lib\site-packages\matplotlib\__init__.py in <module>()
	   1046
	   1047 # this is the instance used by the matplotlib classes
	-> 1048 rcParams = rc_params()
	   1049
	   1050 if rcParams['examples.directory']:

	C:\Python27-64\lib\site-packages\matplotlib\__init__.py in rc_params(fail_on_error)
	    895     default matplotlib rc file.
	    896     """
	--> 897     fname = matplotlib_fname()
	    898     if not os.path.exists(fname):
	    899         # this should never happen, default in mpl-data should always be found

	C:\Python27-64\lib\site-packages\matplotlib\__init__.py in matplotlib_fname()
	    746       system-defined copy.
	    747     """
	--> 748     fname = os.path.join(os.getcwd(), 'matplotlibrc')
	    749     if os.path.exists(fname):
	    750         return fname

	C:\Python27-64\lib\ntpath.pyc in join(a, *p)
	    106                     path += b
	    107                 else:
	--> 108                     path += "\\" + b
	    109             else:
	    110                 # path is not empty and does not end with a backslash,

	UnicodeDecodeError: 'ascii' codec can't decode byte 0xe5 in position 19: ordinal not in range(128)



Ex: ascii path:

	In [1]: pwd
	Out[1]: u'C:\\python\\external'

	In [2]: import matplotlib

	In [3]: matplotlib.v
	matplotlib.validate_backend matplotlib.verbose

	In [3]: matplotlib.__v
	matplotlib.__version__        matplotlib.__version__numpy__

	In [3]: matplotlib.__version__
	Out[3]: u'1.4.0'