#28 add test for minDate maxDate with edit input

Author: hexadecy

index.html

@@ -134,7 +134,7 @@ <h2>Datetime Pickers</h2>
           <label>Date/Time Picker edit input</label>
           <input mdc-datetime-picker date="true" time="true" type="text" id="datetimeedit"
                  placeholder="YYYY-MM-DD HH:MM" show-todays-date minutes="true"
-                 min-date="date" edit-input="true" show-icon="true"
+                 min-date="minDate" max-date="maxDate" edit-input="true" show-icon="true"
                  ng-model="dateTimeEdit">
         </md-input-container>
         <div flex-gt-md="grow" ex-source-code target="input"></div>