it now makes more sense to return a boolean for isLockedExclusivelyBy() from the lock()
method, to make it easier to reason about the atomic-ness of the operation

With the MVStore option, when using multiple threads that concurrently create indexes or tables, it was relatively easy to get a lock timeout on the "SYS" table.

With the MVStore option, when using multiple threads that concurrently create indexes or tables, it was relatively easy to get a lock timeout on the "SYS" table.

MVStore: improved error messages and logging; improved behavior if there is an error when serializing objects.

In the server mode, when reading from a CLOB or BLOB, if the connection was closed, a NullPointerException could be thrown instead of an exception saying the connection is closed.

DatabaseMetaData.getProcedures and getProcedureColumns could throw an exception if a user defined class is not available.

CSV tool: the rowSeparator option is no longer supported, as the same can be achieved with the lineSeparator.

A minimal perfect hash function tool: test with real-world data, improved error detection and handling