Renamed IModelCondition to ICommandCondition.
Introduced the IModelTransformer interface.
Introduced the TransformableCommand class.
Introduced some properties.
Implemented ExecuteAsync(User).
Implemented ExecuteAsync(Article).
Implemented ExecuteAsync(Keyword).
Implemented ExecuteAsync(Bookmark).
Implemented the ModelTransformer class.
Renamed TrueCondition to CommandCondition.
Merge branch 'transformer'
Reordered constructor arguments of RelayKeywordsCommand.
Removed IArticleCommand.
Commented out some lines of Program to remove irrelevant classes.
Removed ArticleCollectingExecutor.
Removed ArticleTransformationCollector.
Removed DelegateTransformation.
Introduced the SubjectFromBodyTransformer class.
Introduced the Length property.
Implemented TransformAsync(Article).