修改了下接口

将Options改成了单例模式方便使用
Skin去掉了一些无意义项，修改了个拼写错误
Skin.Background的bug修复
将displayer改得兼容新接口
合并到master

天知道为啥会有冲突
合并回来
客户端又出bug
a
a
之前merge反了
解决刷新效率问题，增加了控制函数，部分重构displayer以适应接口
Merge remote-tracking branch 'origin/LYZ'
目录分析基本完成
Merge remote-tracking branch 'origin/LYZ'
Init server php files
finish basic query part of db class.
Finish insert function for db class.
Merge branch 'class-database'

Conflicts:
	Server/src/db.php
	Server/test/db_test.php
Delete download.php
Delete upload.php
Update db_test.php

delete the password
finish update and delete part of db class.
update test cases for update and delete function for class db.