Added ability to offset and scale most elements.
Upgraded solution to 2013
Meant to check in the test project last time.
Make key renderer methods virtual so I can implement without needing Graphics
Needed constructor that was at least protected
Created SvgUri and used in SvgImage to handle large data URI values
SetClip on SvgRenderer needed to be virtual.  Cleaned up dispose too.
SvgImage now returns a path so it can compute bounds