Extension that adds SVG support

[kvaleev]

Currently, we can only use EPS or PDF images to include in output PDF file, due to LaTeX limitations. For having SVG support we need to implement some preprocessing that'll convert SVG images (for instance via Inscape — http://ftp.cvut.cz/tex-archive/info/svg-inkscape/InkscapePDFLaTeX.pdf) to EPS and change the extension of the image in the source PDF file.