new tool for binary logs handling

Managing binary logs can be quite a pain.
if expire_log_days is not enough for your usage (need to rotate faster than 1 day, or need more control), you have to do the following steps :

- log on every slave and check latest timestamp / last log file read
- list the binary log files on master
- determine earliest file needed
- purge all log files up to (but not including) the earliest file. Or use timestamp (PURGE BINARY LOGS BEFORE '2012-10-02 22:46:26';)

This process is also described in officiel documentation here :
http://dev.mysql.com/doc/refman/5.5/en/purge-binary-logs.html

This could be done automatically by a smart tool, that could find all slaves (or rely on user input), check everything needed, and issue PURGE LOGS instructions as necessary.