[ADF-918] Activiti Start Task - Refactoring (#2065)

* [#DW-60] Task-create Task

* Updated en.json with new form fields
* Refactored start Button(Disable/Enable)
* Migrated from mdl to md
* Added documentation

* #DW-60 Task- create task

* Changed component name ActivitiStarttaskButton to ActivitiStartTaskComponent
* activiti-start-task to adf-start-task

* [ADF-918]  Activiti Start Task - Refactoring

* Removed unwanted  activiti-start-task.png
* Renamed component name in test
* Refactored CSS

* [ADF-918] Activiti Start Task - Refactoring

* Added condtional parameter passing and added a test case

* [ADF-918] Activiti Start Task - Refactoring

* Removed trailing space.
* Refactored Spec file.

* [ADF-918] Activiti Start Task - Refactoring

* Created  startTaskModel with form feilds.
* Modified testcases  after adding startTaskModel.
* Removed @input property.

* [ADF-918] Activiti Start Task - Refactoring

* Fixed tslint issuse (Exceeds maximum line length)
* Refactored date field.

* [ADF-918] Activiti Start Task - Refactoring

* Changed property name date to dueDate.

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

@@ -17,7 +17,17 @@
 
 import { DatePipe } from '@angular/common';
 import { ModuleWithProviders, NgModule } from '@angular/core';
-import { MdButtonModule, MdIconModule, MdInputModule, MdProgressSpinnerModule } from '@angular/material';
+import { 
+    MdButtonModule, 
+    MdIconModule, 
+    MdInputModule, 
+    MdProgressSpinnerModule, 
+    MdDatepickerModule, 
+    MdGridListModule, 
+    MdAutocompleteModule, 
+    MdNativeDateModule, 
+    MdSelectModule 
+} from '@angular/material';
 import { ActivitiFormModule } from 'ng2-activiti-form';
 import { CoreModule } from 'ng2-alfresco-core';
 import { DataTableModule } from 'ng2-alfresco-datatable';
@@ -32,12 +42,12 @@ import {
     ActivitiCreateTaskAttachmentComponent,
     ActivitiFilters,
     ActivitiPeople,
-    ActivitiPeopleSearch,
-    ActivitiStartTaskButton,
-    ActivitiTaskDetails,
     ActivitiTaskHeader,
-    ActivitiTaskList,
     AdfCommentListComponent,
+    ActivitiPeopleSearch,
+    ActivitiStartTaskComponent,
+    ActivitiTaskDetails,
+    ActivitiTaskList,
     NoTaskDetailsTemplateComponent,
     PeopleList,
     TaskAttachmentListComponent
@@ -59,7 +69,7 @@ export const ACTIVITI_TASKLIST_DIRECTIVES: any[] = [
     ActivitiComments,
     ActivitiPeople,
     ActivitiTaskHeader,
-    ActivitiStartTaskButton,
+    ActivitiStartTaskComponent,
     ActivitiPeopleSearch,
     TaskAttachmentListComponent,
     ActivitiCreateTaskAttachmentComponent,
@@ -81,7 +91,12 @@ export const ACTIVITI_TASKLIST_PROVIDERS: any[] = [
         MdIconModule,
         MdButtonModule,
         MdInputModule,
-        MdProgressSpinnerModule
+        MdProgressSpinnerModule,
+        MdDatepickerModule,
+        MdNativeDateModule,
+        MdSelectModule,
+        MdAutocompleteModule,
+        MdGridListModule
     ],
     declarations: [
         ...ACTIVITI_TASKLIST_DIRECTIVES