Bug 199834 Enable access to IContent object in IReportItemPresentation layer
In IReportItemPresentation layer, the extended item may want to access properties from current IContent object, for example, bookmark, content style. So we need expose the content object in this layer.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/extension/ReportItemPresentationBase.java
* 
	 * @see org.eclipse.birt.report.engine.extension.IReportItemPresentation#setModelObject(org.eclipse.birt.report.model.api.ExtendedItemHandle)
	 */
	public void setModelObject( ExtendedItemHandle modelHandle )
	{
		this.modelHandle = modelHandle;
	}
	public void setApplicationClassLoader( ClassLoader loader )
	{
		this.appClassLoader = loader;
	}
	
	public void setScriptContext( IReportContext context )
	{
		this.context = context;
	}
	public void setReportQueries( IBaseQueryDefinition[] queries )
	{
		this.queries = queries;
	}
	public void setLocale( Locale locale )
	{
		this.locale = locale;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.engine.extension.IReportItemPresentation#setResolution(int)
	 */
	public void setResolution( int dpi )