Support for diffs of UTF-8 encoded files

[https://www.google.com/accounts/o8/id?id=AItOawlJa6QJcUnwqaUiOAgop4U4wANp_y0hDu4]

It would be great if the bcfg2-client could print the differences of UTF-8 encoded files (now it only shows the diff of ascii files).

[solj]

Looks like this may be a python limitation: ​http://bugs.python.org/issue2052

[https://www.google.com/accounts/o8/id?id=AItOawlJa6QJcUnwqaUiOAgop4U4wANp_y0hDu4]

I think that it's not a difflib limitation:

[email protected]:~$ python
Python 2.6.5 (r265:79063, Apr 16 2010, 13:57:41) 
[GCC 4.4.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import difflib
>>> a = """á
... é
... í
... """
>>> b = """á
... e
... i
... """
>>> diff = difflib.ndiff(a.split('\n'), b.split('\n'))
>>> print '\n'.join(diff)
  á
- é
- í
+ e
+ i

[solj]

Fixed by Holger Weiß in 8c497c815589c7c5878490df7661c6f5d3330829.