Changes for decoupling annotations from the UI

objective:
	- add 
	
	
step 1:
	- split annotation and annotation presentation
	- annotations support annotation adapters
	- annotation presentation implements annotation adapter
	- introduce extension point for providing custom annotation presentations
		- check relation between this extension point and marker image provider
	
step 2:
	- move annotation model support to file buffers
	
step 3:
	- provide marker annotation model as default by file buffer inluding markerUpdater extension point
	
step 4:
	- introduce new extension point for creating new annotation models for a file buffer
	- use extension point to provide