The fragments were behaving as the "root" of a document instead of potentially being anywhere.

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.