Translate sign in page

app/locales/en/translations.js

@@ -15,6 +15,16 @@ export default {
     notes: 'Notes',
     edit: 'Edit'
   },
+  login: {
+    messages: {
+      sign_in:  'please sign in'
+    },
+    labels: {
+      password: 'Password',
+      username: 'Username',
+      sign_in:  'sign in'
+    }
+  },
   inventory: {
     messages: {
       no_requests: 'No requests found.',

app/templates/login.hbs

@@ -1,12 +1,12 @@
 <div class="container">
     <form class="form-signin" role="form" {{action 'authenticate' on='submit'}}>
-        <h2 class="form-signin-heading">Please sign in</h2>
+        <h2 class="form-signin-heading">{{t 'login.messages.sign_in'}}</h2>
         <div class="form-group">
-            {{input id='identification' value=identification placeholder='Username' class='form-control'}}
+            {{input id='identification' value=identification placeholder=(t 'login.labels.username') class='form-control'}}
         </div>
         <div class="form-group">
-            {{input id='password' type='password' value=password placeholder='Password' class='form-control'}}
+            {{input id='password' type='password' value=password placeholder=(t 'login.labels.password') class='form-control'}}
         </div>
-        <button class="btn btn-lg btn-primary btn-block" type="submit">Sign in</button>
+        <button class="btn btn-lg btn-primary btn-block" type="submit">{{t 'login.labels.sign_in'}}</button>
     </form>
-</div> <!-- /container -->
+</div> <!-- /container -->