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

According to https://developer.mozilla.org/en-US/docs/Web/SVG/Attribute/transform
translate transformation can be specified without second parameter

- 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)

* SvgDocument can calculate its size in percentage
* SvgTransform collection can return all matrices multiplied

* fill can be null -> none in XML
* added type converters for enums
* added type converter for unitcollection
* fixes several viewbox bugs
* document can now draw into a given bitmap
* content of SVG tag is written (used by the text tag)
* changed font handling in text element, still need proper alignment
* changed intersparse character of SvgTransformConverter.cs to space, because inkscape couldn't parse comma
* added class diagram for basic shapes