[MySQL][Spider]Spider-2.17 released

I'm pleased to announce the release of Spider storage engine version 2.17(beta).
Spider is a Storage Engine for database sharding.
http://spiderformysql.com/

The main changes in this version are following.
- Add table parameter "semi_split_read_limit".
- Add server parameter "spider_semi_split_read_limit".
  This parameters are for searching performance improvement.

Please see "99_change_logs.txt" in the download documents for checking other changes.

Enjoy!