- 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

Removed some compiler warnings.

- Fixed a bug that caused <text/> elements to be parsed incorrectly, leading to exceptions within the document.

- Fixed #7986: public static SvgDocument Open(XmlDocument document) returns null: Implemented the proposed solution
- Added more XML API comments.
- Removed SvgVisualElementEvents.cs class - this was not used and not likely to be used

This was accomplished by adding the new static method to the SvgRenderer class (as detailed in the work item) and a new Draw method overload that takes in a Graphics object as a parameter.

- Made all transforms (SvgTranslate, SvgMatrix etc) sealed types.

- Fixed #6324: SvgElement.PushTransforms and ViewBox - not necessarily related to ViewBox but every   element was 'resetting' the current graphics transform if the element contained it's own transform. This 
  was a very small fix for a large problem (SvgElement.PushTransforms Matrix transformMatrix = new   Matrix(); changed to Matrix transformMatrix = renderer.Transform; in order to inherit the current   transform.)
- Fixed #6344: Parsing document incorrectly parents elements when it encounters empty nodes which are   in a different namespace. Empty nodes are now ignored and current nodes are closed as required. We'll 
  see how this fix goes.
- Fixed #6381: Units in inches are incorrectly parsed as millimeters - problem was caused by some   copy/paste work.
- Graphics has been replaced by SvgRenderer. This is essentially a wrapper around graphics but will allow
  custom svg related properties in the future when needed.
- Removed ISvgRenderer: A concrete implementation is suitable.
- SvgElement.ElementName has been changed to non-virtual and is set by the parser instead of the   developer having to specify it when developing the class.
- Added more XML API documentation.

Fixed bitmap size calculation in SvgDocument.Draw(); Added guard on case when exception occured during rendering.

- Added initial custom/querystring 'parameters' implementation (#5652)

- Fixed support for text-anchor="middle" and text-anchor="end" for <text/> elements.
- Added more XML API documentation
- Added x attribute and y attribute support to <use/> elements.