BoneCP 0.7.1 RC1 改进内容：
+ Added overloaded methods for BoneCPConfig to be able to specify the timings via a TimeUnit parameters.
+ Catch SQLExceptions only, not throwable
+ Split up timings for idleMaxAge/idleConnectionTestPeriod so as to make them independent on each other
+ More collection of statistics.
+ Consider MySQL 08S01 error as a DB failure rather than a single connection failure (terminates all existing connections)
+ Don't start connection testing thread immediately.
+ Add defaultReadOnly,defaultAutoCommit,defaultTransactionIsolation,defaultCatalog