Added search and get first sentence using . or ?

Author: hunkim

question.html

@@ -49,7 +49,7 @@
 					<form id="todo-form" ng-submit="addTodo()">
 					-->
           <textarea type="text" id="new-todo" class="form-control"
-					placeholder="Search or Post a Question"
+					placeholder="Search or Post Question"
 				  ng-model="input.wholeMsg" autofocus></textarea>
           <span class="input-group-btn">
           <button class="btn btn-default" type="button" ng-click="addTodo()">Ask</button>