[Bf-python] svg2obj script.

[jmsoler at free.fr]

http://jmsoler.free.fr/util/blenderfile/py/svg2obj_059.py

0.5.9 : - many improvements for faster and clearer code
          suggested by cambo and martin.
        - replacement of "%s" statement by str function.
        - correction of an error in the scale transform management
        - correction in the management of the stack transformation
          that rise an error under python 2.5 but curiously not with
          python 2.4

jms