FIXED: MAJOR bug in libxml parser (now being worked around) so that XML DTD Entities are now correctly parsed.
ADDED: support for multiple SVG elements in a single document
ADDED: support for user-overrides on the SVG viewport (causing the output UIImage to be arbitrary size/shape/resolution)
FIXED: SVG strokes weren't always displaying correctly
ADDED: new SVG test document that demonstrates the SVG viewport (currently renders mostly, but several unsupported features in there)