fixing Input docs

Author: pablohpsilva

docs/src/pages/components/Input.vue

@@ -161,6 +161,11 @@
             <form novalidate @submit.stop.prevent="submit">
               <md-input-container>
                 <label>Initial value</label>
+                <md-input v-model="initialValue"></md-input>
+              </md-input-container>
+              
+              <md-input-container>
+                <label>Initial value (read only)</label>
                 <md-input v-model="initialValue" readonly></md-input>
               </md-input-container>