added body

ts/docx/document/body/doc-grid.ts

@@ -0,0 +1,12 @@
+import {XmlComponent, Attributes} from "../../xml-components";
+
+export class DocumentGrid {
+    private docGrid: Array<XmlComponent>;
+
+    constructor() {
+        this.docGrid = new Array<XmlComponent>();
+        this.docGrid.push(new Attributes({
+            linePitch: "360"
+        }));
+    }
+}