Version 1.3

• Infinite bounds for RANGE partitioning: (-inf, X) ... (Y, +inf);
• New function set_interval(relation, value);
• Validate RANGE interval (restrict trivial values);
• Rebuild COPYed / INSERTed tuples for partitions with different column set (e.g. append_range_partition() after some column has been dropped, issue #74);
• Pass schema names to partition initialization callback (issue #76);
• Fix inability to upgrade PostgreSQL cluster (issue #75);
• Merge arbitrary amount of RANGE partitions (function merge_range_partitions(partitions));
• Stability-related fixes;