fpvectorial: Improves a lot the SVG reader. Finishes the support for commands without a command token, adds support for reading the style of the <svg> tag. Radad test image now almost perfect.

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@40852 4005530d-fff6-0310-9dd1-cebe43e6787f