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/Store/LightCache.php

@@ -178,6 +178,7 @@ class LightCache
                 $r[$k] = self::parseGet($v);
             }
         }
+        if(self::$config["persistence_path"] == "") return;
         $r = file_put_contents(self::$config["persistence_path"], json_encode($r, 128 | 256));
         if ($r === false) Console::error("Not saved, please check your \"persistence_path\"!");
     }