Inkscape tools

Intro 2 tools based on Inkscape.

__svg_to_png_and_nit__ reads a SVG file and outputs 2 files:
* A single png file
* A Nit source file and class, with attributes pointing to all objects with IDs beginning with 0.

__svg_to_icons__ Generates PNG files from a SVG file. It can output the format expected by Android projects.