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/Utils/ZMUtil.php

@@ -40,6 +40,7 @@ class ZMUtil
         foreach (server()->connections as $v) {
             server()->close($v);
         }
+        LightCache::savePersistence();
         //DataProvider::saveBuffer();
         Timer::clearAll();
         server()->reload();