Remove deprecated handler.register

wo/cli/plugins/log.py

@@ -571,10 +571,10 @@ class WOLogMailController(CementBaseController):
 
 def load(app):
     # register the plugin class.. this only happens if the plugin is enabled
-    handler.register(WOLogController)
-    handler.register(WOLogShowController)
-    handler.register(WOLogResetController)
-    handler.register(WOLogGzipController)
-    handler.register(WOLogMailController)
+    app.handler.register(WOLogController)
+    app.handler.register(WOLogShowController)
+    app.handler.register(WOLogResetController)
+    app.handler.register(WOLogGzipController)
+    app.handler.register(WOLogMailController)
     # register a hook (function) to run after arguments are parsed.
     hook.register('post_argument_parsing', wo_log_hook)