[ADF-112] Change task details feature (due date) (#2071)

* Add Assignee to readonly mode

* Style adoption and first steps to editable mode

* Switch between mode coverage

* Rebase fix

* Because of design and requirement changes, revert unnecessary parts

* Small refactoring before the introduction of CardViewDateItem

* Fix AdfCardView tests

* Editable Card date item

* Do not allow edit on task details after the task is completed.

* Update task details request

* Login footer switch fix

* Login customisable copyright text

* Card text item (first sketches)

* Small fix for supported card items' template

* Dynamic component loading for card view items

* Test and linting fixes

* Updating Readme.md

* Update Readme.md

* Fix Readme.md errors

* CardViewTextItemComponent tests

* Rebase fix

ng2-components/ng2-activiti-tasklist/index.ts

@@ -20,6 +20,7 @@ import { ModuleWithProviders, NgModule } from '@angular/core';
 import {
     MdAutocompleteModule,
     MdButtonModule,
+    MdCardModule,
     MdDatepickerModule,
     MdGridListModule,
     MdIconModule,
@@ -91,6 +92,7 @@ export const ACTIVITI_TASKLIST_PROVIDERS: any[] = [
         MdIconModule,
         MdButtonModule,
         MdInputModule,
+        MdCardModule,
         MdProgressSpinnerModule,
         MdDatepickerModule,
         MdNativeDateModule,