Special character "î" in AUTHORS makes "license" crash

[Benoît Legat]

When runing
$ quickly license
if there are special character like "î" in AUTHORS, it crashes

How to reproduce the bug:
Create a project
$ quickly create ubuntu-application foo
Edit the AUTHORS file and set the name to "Benoît"
$ quickly edit
Generate the license
$ quickly license

What is the output
Traceback (most recent call last):
  File "/usr/share/quickly/templates/ubuntu-application/license.py", line 314, in <module>
    licensing(license)
  File "/usr/share/quickly/templates/ubuntu-application/license.py", line 290, in licensing
    {'translatable': 'yes'})
  File "/usr/share/quickly/templates/ubuntu-application/internal/quicklyutils.py", line 166, in change_xml_elem
    new_node.text = value
  File "lxml.etree.pyx", line 904, in lxml.etree._Element.text.__set__ (src/lxml/lxml.etree.c:37110)
  File "apihelpers.pxi", line 721, in lxml.etree._setNodeText (src/lxml/lxml.etree.c:16855)
  File "apihelpers.pxi", line 1366, in lxml.etree._utf8 (src/lxml/lxml.etree.c:22060)
ValueError: All strings must be XML compatible: Unicode or ASCII, no NULL bytes or control characters
ERROR: license command failed
Aborting

The version on python I use:
$ python --version
Python 2.7.3

The version of quickly I use:
$ quickly --version
Quickly 12.04
  Python interpreter: /usr/bin/python 2.7.3
  Python standard library: /usr/lib/python2.7

  Quickly used library: /usr/lib/python2.7/dist-packages/quickly
  Quickly data path: /usr/share/quickly
  Quickly detected template directories:
          /usr/share/quickly/templates/

Copyright 2009 Rick Spencer
Copyright 2009-2011 Didier Roche
Copyright 2010-2011 Canonical Ltd
https://launchpad.net/quickly

quickly comes with ABSOLUTELY NO WARRANTY. quickly is free software, and
you may use, modify and redistribute it under the terms of the GNU
General Public License version 3 or later.

[Andres Muniz (andresmp)]

Happens with é and ñ. I am using quickly version 11.10.

[João Antonio Santana (joaosantana)]

Same with "ã".

$ quickly --version
Quickly 12.04
  Python interpreter: /usr/bin/python 2.7.3
  Python standard library: /usr/lib/python2.7

  Quickly used library: /usr/lib/python2.7/dist-packages/quickly
  Quickly data path: /usr/share/quickly
  Quickly detected template directories:
          /usr/share/quickly/templates/

[João Antonio Santana (joaosantana)]

Seems it affects applications created with ubuntu-applications template. I've just created an ubuntu-cli template application and quickly license works as expected, although AUTHORS file have special characters.