TODO: rebase Cleaning the source of SymPy logo *.svg file, and generate variants from it.

Cleaning of *.svg file:

    - make the tail of the snake to be transparent.
    - remove xmlns:inscape and xmlns:sodipodi attributes.
    - insert the title and description.
    - determ, rearrange and comment the parts of of svg elements.
    - regroup the svg parts logically.
    - align SymPy text to its center.
    - set a size of logo picture to be square.
    - upper Integral on the left edge of cube

To generate use:

    ./bin/generate_logos.py --all


Result is:
https://github.com/goodok/sympy/tree/logo2/doc/logo/generated