update to v2.0.0-b4 version

change global.php config load time and logic
set context get server function available more time
delete unused comment and @CQAPISend
@CQCommand add start_with and end_with
set exceptions extended by ZMException
rename @SwooleSetup to @ZMSetup
fix quotes for global.php
fix LightCache empty presistence_path error
remove RemoteShell

src/ZM/Exception/ZMException.php

@@ -0,0 +1,12 @@
+<?php
+
+
+namespace ZM\Exception;
+
+
+use Exception;
+
+class ZMException extends Exception
+{
+
+}