Description of problem:
Starting canta throws error

Version-Release number of selected component (if applicable):
6sta1

How reproducible:


Steps to Reproduce:
1. Enter "canta"at CLI
2.get feedback
* Soya * Using Software Surface.
* Soya * Using 8 bits stencil buffer
* Soya * OpenGL initialization  [OK]

* Soya * version 0.14
* Using OpenGL 3.0 Mesa 11.2.2
*   - renderer : Mesa DRI Intel(R) HD Graphics 5500 (Broadwell GT2) 
*   - vendor   : Intel Open Source Technology Center
*   - maximum number of lights        : 8
*   - maximum number of clip planes   : 8
*   - maximum number of texture units : 8
*   - maximum texture size            : 8192 pixels

None
Traceback (most recent call last):
  File "/usr/share/games/canta/run_canta", line 63, in <module>
    if __name__ == '__main__': main()
  File "/usr/share/games/canta/run_canta", line 61, in main
    CoreInit(window_title, APP_DIR)
  File "/usr/lib/python2.7/site-packages/canta/display/core_init.py", line 66, in __init__
    self._start()
  File "/usr/lib/python2.7/site-packages/canta/display/core_init.py", line 118, in _start
    self.theme_mgr.get_theme(self.theme_name, self.theme_dir)
  File "/usr/lib/python2.7/site-packages/canta/theme/theme_manager.py", line 35, in get_theme
    self.themes[theme_name] = Theme(self.parent_world, theme_dir, self.theme_cfg_file)
  File "/usr/lib/python2.7/site-packages/canta/theme/theme.py", line 65, in __init__
    self.create_models()
  File "/usr/lib/python2.7/site-packages/canta/theme/theme.py", line 235, in create_models
    self.debug)
  File "/usr/lib/python2.7/site-packages/canta/theme/static_model.py", line 84, in __init__
    material.texture = soya.Image.get(self.envmap)# The textured sphere map
  File "/usr/lib64/python2.7/site-packages/soya/__init__.py", line 259, in get
    return klass._alls.get(filename) or klass._alls.setdefault(filename, klass.load(filename))
  File "/usr/lib64/python2.7/site-packages/soya/__init__.py", line 365, in load
    image = open_image(file)
  File "image.pyx", line 28, in _soya.open_image
  File "image.pyx", line 46, in _soya.image_from_pil
  File "/usr/lib64/python2.7/site-packages/PIL/Image.py", line 699, in tostring
    "Please call tobytes() instead.")
Exception: tostring() has been removed. Please call tobytes() instead.                                                                     
* Soya3D * Quit...      
3.