Changed timestamp to return string in YYYY-MM-DD HH:MM:SS format.
DATE_ADD() and related functions now returns correct DATE/DATETIME type depending on argument types.
Now all tests passes, still some work left to remove warnings in log files from mysql-test-run


mysql-test/r/cast.result:
  New result for time
mysql-test/r/delayed.result:
  Timestamp update
mysql-test/r/derived.result:
  Fix after bulk insert change
mysql-test/r/explain.result:
  Fix after bulk insert change
mysql-test/r/func_date_add.result:
  Timestamp change
mysql-test/r/func_str.result:
  Timestamp change
mysql-test/r/func_time.result:
  Timestamp change
mysql-test/r/innodb.result:
  Timestamp change
mysql-test/r/join_outer.result:
  Fix after bulk insert change
mysql-test/r/key_primary.result:
  Fix after bulk insert change
mysql-test/r/keywords.result:
  Timestamp change
mysql-test/r/merge.result:
  Removed warning
mysql-test/r/odbc.result:
  Fix after bulk insert change
mysql-test/r/range.result:
  Fix after bulk insert change
mysql-test/r/select.result:
  Fix after bulk insert change
mysql-test/r/subselect.result:
  Fixed EXPLAIN output
mysql-test/r/type_datetime.result:
  Timestamp update
mysql-test/r/type_ranges.result:
  Timestamp update
mysql-test/r/type_timestamp.result:
  Timestamp update
mysql-test/r/union.result:
  EXPLAIN UPDATE
mysql-test/t/func_str.test:
  Timestamp update
mysql-test/t/func_time.test:
  New test for interval type result
mysql-test/t/merge.test:
  Remove warnings of wrong drop table
mysql-test/t/type_datetime.test:
  Timestamp change
mysql-test/t/type_timestamp.test:
  Timestamp change
sql/field.cc:
  Changed timestamp to return string in YYYY-MM-DD HH:MM:SS format
sql/field.h:
  Changed timestamp to return string in YYYY-MM-DD HH:MM:SS format
sql/item.cc:
  Binary protocol update
sql/item.h:
  Binary protocol update
sql/item_func.cc:
  Added comment
sql/item_func.h:
  @variables are always returned to the client as strings
sql/item_timefunc.cc:
  Changed INTERVAL to return correct type
sql/item_timefunc.h:
  Changed INTERVAL to return correct type
sql/mysqld.cc:
  Changed default pthread_attr_setstacksize to 129K
sql/protocol.cc:
  More type checking
sql/set_var.cc:
  Fixed that @convert works ok with new protocol
sql/sql_analyse.cc:
  Fixed bug in analyze
sql/sql_class.cc:
  Fixed bug from last push in LIMIT
sql/sql_error.cc:
  More optimal types
sql/sql_repl.cc:
  Binary protocol changes
sql/sql_select.cc:
  Fixed bug in multi-table-update
  Changed EXPLAIN to return NULL instead of empty strings
sql/sql_show.cc:
  Binary protocol