异常类规范 增加异常类 改进Query类的value和column的缓存冲突问题

library/think/cache/driver/Memcache.php

@@ -30,12 +30,12 @@ class Memcache
      * 架构函数
      * @param array $options 缓存参数
      * @access public
-     * @throws Exception
+     * @throws \BadFunctionCallException
      */
     public function __construct($options = [])
     {
         if (!extension_loaded('memcache')) {
-            throw new Exception('_NOT_SUPPERT_:memcache');
+            throw new \BadFunctionCallException('not support memcache');
         }
         if (!empty($options)) {
             $this->options = array_merge($this->options, $options);