Bug 484982 - Weave should support SeaMonkey. r=thunder, r=Mardak

Add seamonkey bits for manifest/install. Start with Form, History, Password engines.. No places bookmarks and tabs seem to have issues applying(?)

services/sync/modules/service.js

@@ -394,6 +394,10 @@ WeaveSvc.prototype = {
         engines = ["Bookmarks", "Form", "History", "Password", "Tab"];
         break;
 
+      case "SeaMonkey":
+        engines = ["Form", "History", "Password"];
+        break;
+
       case "Thunderbird":
         engines = ["Cookie", "Password"];
         break;