Added API to access markers

As of now there is no public API to access markers. This PR adds method `editor.getModelMarkers`. Should resolve
https://github.com/Microsoft/monaco-editor/issues/30.

src/vs/editor/standalone/browser/standaloneEditor.ts

@@ -194,6 +194,15 @@ export function setModelMarkers(model: editorCommon.IModel, owner: string, marke
 	}
 }
 
+/**
+ * Get markers for owner ant/or resource
+ * @returns {IMarkerData[]} list of markers
+ * @param filter
+ */
+export function getModelMarkers(filter: { owner?: string, resource?: URI, take?: number }): IMarkerData[] {
+	return StaticServices.markerService.get().read(filter);
+}
+
 /**
  * Get the model that has `uri` if it exists.
  */
@@ -331,6 +340,7 @@ export function createMonacoEditorAPI(): typeof monaco.editor {
 		createModel: createModel,
 		setModelLanguage: setModelLanguage,
 		setModelMarkers: setModelMarkers,
+		getModelMarkers: getModelMarkers,
 		getModels: getModels,
 		getModel: getModel,
 		onDidCreateModel: onDidCreateModel,

src/vs/monaco.d.ts

@@ -833,6 +833,17 @@ declare module monaco.editor {
 	 */
 	export function setModelMarkers(model: IModel, owner: string, markers: IMarkerData[]): void;
 
+	/**
+	 * Get markers for owner ant/or resource
+	 * @returns {IMarkerData[]} list of markers
+	 * @param filter
+	 */
+	export function getModelMarkers(filter: {
+		owner?: string;
+		resource?: Uri;
+		take?: number;
+	}): IMarkerData[];
+
 	/**
 	 * Get the model that has `uri` if it exists.
 	 */