Issues with umlauts and probably other unicode characters

[pollonamid]

Fritzbox with FritzOS 7
The program crashes when a smarthome device has an umlaut in its name.

Traceback (most recent call last):
File "/usr/bin/fritzhome", line 11, in
load_entry_point('pyfritzhome==0.4.0', 'console_scripts', 'fritzhome')()
File "/usr/lib/python2.7/site-packages/pyfritzhome/cli.py", line 187, in main
args.func(fritzbox, args)
File "/usr/lib/python2.7/site-packages/pyfritzhome/cli.py", line 20, in list_all
devices = fritz.get_devices()
File "/usr/lib/python2.7/site-packages/pyfritzhome/fritzhome.py", line 146, in get_devices
for element in self.get_device_elements():
File "/usr/lib/python2.7/site-packages/pyfritzhome/fritzhome.py", line 130, in get_device_elements
plain = self._aha_request('getdevicelistinfos')
File "/usr/lib/python2.7/site-packages/pyfritzhome/fritzhome.py", line 106, in _aha_request
return rf(plain)
UnicodeEncodeError: 'ascii' codec can't encode character u'\xfc' in position 624: ordinal not in range(128)

[mjklemm]

This is a typical converstation problem that I have stumpled across with my FritzBox as well. I will have a look at this and see if I can prepare a pull request to provide a fix.