- Removed all content processor types from the content pipeline.
- Added the EffectRepository class.
- Removed CompiledEffectContent; replaced by EffectContent.
- Made the MaterialContent class abstract; removed its cloning capability.
- Removed and renamed several properties from MaterialTextureContent.
- Removed MaterialTextureContentCollection.
- Removed several MaterialTextureContent-related enums.
- Removed SceneContent; replaced by EntityContent.
- Removed the "context" parameter from IContentImporter.Import, and changed it to an instance property.