Support for Larger Stroke Animations

This fixes #1 by adding support for larger stroke animations.

On the command line, you can now specify the optional /imgw: and /imgh: arguments. These each take pixel values and default to 109 to maintain backwards compatibility.

Be sure to set these so each character can be drawn into a box that is square (i.e. set imgh to the same value as imgw). If you don't, the animation probably won't scale properly.

One-Off Update for 2022

This is a one-off update to replace the ancient convert.exe from the ImageMagick project with direct calls to the Magick.NET library and to update the ancient build of the SharpVectors library from the long-gone CodePlex with a more recent version from GitHub.

The KanjiVG library XML file was also updated to the latest version available at the time of release.
​
Enjoy and see you again in 2033...