Including occupied username and renaming DB field

Now it shows the username of who is using an item.
Item db field 'usedBy' was renamed to 'used_by' to keep consistence.

resources/views/home/unusedItem.blade.php

@@ -0,0 +1,7 @@
+<span class="float-right">
+    <form action="/take" method="POST">
+        {{ csrf_field() }}
+        <input type="hidden" name="item" value="{{$item->id}}"> 
+        <button type="submit" class="btn btn-sm btn-success">Take It</button>
+    </form>
+</span>