Fix bad imports in DetailsList module (and related), causing issues when trying to use them in apps (#43)

Author: bengry

libs/fabric/src/lib/components/details-list/details-list.module.ts

@@ -6,7 +6,7 @@ import { NgModule, NO_ERRORS_SCHEMA } from '@angular/core';
 import { registerElement } from '@angular-react/core';
 import { DetailsList } from 'office-ui-fabric-react/lib/DetailsList';
 
-import { FabGroupModule } from '../group';
+import { FabGroupModule } from '../group/group.module';
 import { FabDetailsListComponent } from './details-list.component';
 import {
   DetailsListColumnDirective,

libs/fabric/src/lib/components/details-list/directives/details-list-groups.directive.ts

@@ -5,7 +5,7 @@ import { ContentChildren, Directive, QueryList } from '@angular/core';
 import { IGroup } from 'office-ui-fabric-react';
 
 import { ChangeableItemsDirective } from '../../core/shared/changeable-items.directive';
-import { GroupItemDirective } from '../../group';
+import { GroupItemDirective } from '../../group/directives/group-item.directive';
 
 /**
  * Wrapper directive for creating multiple DetailsList Groups