#969 editable input for date column editor

- editable input for date column editor
- display required validation state for date editor (input field)
- date validation for manually inputed value
- min/max date ranges changed to (-100 years from now to +100 years
from now) for date widget and date column editor

refs #969
refs #959

ng2-components/ng2-activiti-form/src/components/widgets/date/date.widget.ts

@@ -38,7 +38,8 @@ export class DateWidget extends TextFieldWidgetComponent implements OnInit, Afte
 
         let settings: any = {
             type: 'date',
-            future: moment().add(21, 'years')
+            past: moment().subtract(100, 'years'),
+            future: moment().add(100, 'years')
         };
 
         if (this.field) {