Place class name on logo block via system_block_view(), updated css.

Author: signalpoint

Diff for: drupalgap.css

@@ -1,13 +1,20 @@
 /**
- * Styles for forms.
+ * Logo
+ */
+.logo {
+  text-align: center;
+}
+
+/**
+ * Forms
  */
 
 div.form-item {
   margin-bottom: 1em;
 }
 
 /**
- * Styles for system messages.
+ * System Messages
  */
 
 div.messages {

Diff for: src/modules/system/system.js

@@ -76,7 +76,7 @@ function system_block_view(delta) {
         break;
       case 'logo':
         if (drupalgap.settings.logo) {
-          return '<div>' +
+          return '<div class="logo">' +
             l(theme('image', {'path': drupalgap.settings.logo}), '') +
           '</div>';
         }