https://github.com/vvvv/SVG/issues/23#issuecomment-25747963

When using T, t, S, or s to create curves, the curves were not rendered
properly. The control point was causing the curve to be inverted.

- Changes to get texts displaying bold / normal weight
- Changes to get textspans work correctly
- Made (semi-hardcoded) document metadata section - allow reading and regurgitating metdata tag from an original source document
- Included image
- Modified paths to allow for scientific notation
- Included ability to have markers for path ends (arrow ends etc)

* added few enum converters

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