lp:~dveeden/mysql-server/binlogtimestamp

Related to MySQL Bug: http://bugs.mysql.com/bug.php?id=42011

This adds a Timestamp column to SHOW BINARY LOGS output based on the file mtime.
mysql> SHOW BINARY LOGS;
+------------------------------+-----------+------------+
| Log_name | File_size | Timestamp |
+------------------------------+-----------+------------+
| mysql_sandbox5616-bin.000001 | 179 | 1392476093 |
| mysql_sandbox5616-bin.000002 | 179 | 1392476109 |
| mysql_sandbox5616-bin.000003 | 143 | 1392476597 |
| mysql_sandbox5616-bin.000004 | 120 | 1392476789 |
+------------------------------+-----------+------------+
4 rows in set (0.00 sec)