Improve import alias

@file/ and @export/ instead of file/ and export/ etc

src/file/relationships/attributes.ts

@@ -1,4 +1,4 @@
-import { XmlAttributeComponent } from "file/xml-components";
+import { XmlAttributeComponent } from "@file/xml-components";
 
 export class RelationshipsAttributes extends XmlAttributeComponent<{
     readonly xmlns: string;

src/file/relationships/relationship/relationship-attributes.ts

@@ -1,4 +1,4 @@
-import { XmlAttributeComponent } from "file/xml-components";
+import { XmlAttributeComponent } from "@file/xml-components";
 
 export class RelationshipAttributes extends XmlAttributeComponent<{
     readonly id: string;

src/file/relationships/relationship/relationship.ts

@@ -1,4 +1,4 @@
-import { XmlComponent } from "file/xml-components";
+import { XmlComponent } from "@file/xml-components";
 import { RelationshipAttributes } from "./relationship-attributes";
 
 export type RelationshipType =

src/file/relationships/relationships.spec.ts

@@ -1,7 +1,7 @@
 // tslint:disable:no-string-literal
 import { expect } from "chai";
 
-import { Formatter } from "export/formatter";
+import { Formatter } from "@export/formatter";
 
 import { Relationships } from "./relationships";
 

src/file/relationships/relationships.ts

@@ -1,4 +1,4 @@
-import { XmlComponent } from "file/xml-components";
+import { XmlComponent } from "@file/xml-components";
 import { RelationshipsAttributes } from "./attributes";
 import { Relationship, RelationshipType, TargetModeType } from "./relationship/relationship";