Provides a presentation reconciler add-on for an `ITextViewer`. A presentation reconciler keep the presentation (styles and colors) in sync with the content of the document serving as the `ITextViewer`'s input.

## Package Specification

`IPresentationReconciler` defines the concept of a presentation reconciler. It collaborates with content type specific presentation damagers (`IPresentationDamager`) which for a given document change determine the region of the presentation which must be rebuild, and content type specific presentation repairers (`IPresentationRepairer`) which construct for a given damage region the document presentation. The package contains a default implementation of `IPresentationReconciler` (`PresentationReconciler`).