Fixed result files

Added new syntax ALTER TABLE t1 REMOVE PARTITIONING,
changed semantics of ALTER TABLE t1 ENGINE=X; to not remove partitioning
Fix a number of mix engine bugs in partitioning

  added HA_EXTRA_WRITE_CACHE case to ha_partition::extra()

  use part_info->item_free_list instead of thd->free_list during partition function parsing

additional fixes

A crash after ALTER TABLE t1 RENAME ...

  When doing an ALTER TABLE on a table using partitioning, force the table
  definition to get reloaded, since it may become invalid whenever the ALTER
  TABLE fails (even for an ALTER TABLE without specific partitioning changes).

Made sure that no subpartition stuff in non-subpartitioned table

with ALTER TABLE ADD/REORGANIZE PARTITION
Ensure that default subpartitioning is removed when subpartitions
are defined in ADD/REORGANIZE PARTITION

  Make partitioned tables report the row format of the underlying
  tables (when they are all the same).

  Temporary tables are no longer allowed to be partitioned.

  NULL value handling

  store copy of partition function string

BUG# 17432: Partitions: wrong result, SELECT ... WHERE <column> is null

BUG# 17430 Partitions: crash on SELECT * FROM t1 WHERE f_int1 IS NULL

a partitioned table, the value of auto_increment fields was not calculated
until after deciding what partition to add the row into, which led to rows
being written to the wrong partitions (or spurious errors).

When creating a new partition, a bogus memory allocation problem was
reported.

KEY event. Partitioning wrongly claimed to be able to handle HA_DUPP_POS
when it was supported by the underlying storage engine, which resulted
in a crash when handling REPLACE statements.

  In presense of subpartitioning use get_part_partition_id() to calculate part_id

  use part_info->no_subparts to calculate partition range in case of subpartitions

used. The problem is that the actual engine was not stored in the .par
file, causing confusion when the default engine was changed. Now the
actual storage engine is stored for subpartitions, as was intended.

Optimised version of ADD/DROP/REORGANIZE partitions for
non-NDB storage engines.
New syntax to handle REBUILD/OPTIMIZE/ANALYZE/CHECK/REPAIR partitions
Quite a few bug fixes

Post-review fixes to original changeset http://lists.mysql.com/internals/32422

Patch that fixes crashing when partition uses blackole for 
underlying tables.

partitioned tables

Select count(*) returned 2 on empty table where handler
used exact count

Used AND when modulo should have been used to calculate partition id
for PARTITION BY KEY and SUBPARTITION BY KEY