Bundle WebStudio pattern images as embedded resources

[jng]

The Maestro.Editors assembly currently assumes that a WebStudio folder exists in the directory this assembly resides in which contains all the line pattern images that are referenced by the geometry style editors.

This requirement hampers the ability to use Maestro.Editors outside of Maestro. The assembly should be as self-contained as possible.

One way to improve this is to have these images bundled into the assembly itself as embedded resources. This may inflate the size of the Maestro.Editors assembly, but would greatly improve the portability.