Support importing without content pipeline.

[manbeardgames]

Add support for runtime importing of the files without the need to build first with the content pipeline.

[manbeardgames]

Currently all importing and processing is done through the MonoGame.Aseprite.ContentPipeline.dll library In order for importing and processing to be performed during runtime, users would need to reference that library in their game project as well as the MonoGame.Aseprite.dll library.

The problem here is that both of these contain .Aseprite in their respective root namespaces, and it could potentially be confusing having the .ContentPipeline namespace as part of a completely different assembly.

Would potentially need to rename the namespaces to resolve this, which would be a breaking change.

[AristurtleDev]

Importing without the MGCB Editor is now possible in MonoGame.Aseprite Version 4.0.0. https://github.com/AristurtleDev/monogame-aseprite/releases/tag/version%2F4.0.0