cases + bug fixes


mysys/my_bitmap.c:
  Removed debug comments
sql/bitvector.h:
  Changed a number of things
  Added new methods, new handling of end bits, faster search
  for bits using word by word search..
sql/field.h:
  Added comment
sql/ha_federated.cc:
  Fixes
sql/ha_innodb.cc:
  Fixes
sql/ha_innodb.h:
  InnoDB still needs the extra calls not needed by anybody else
sql/ha_ndbcluster.cc:
  Removed some timestamp set bit stuff
  Always write all fields in write_row
sql/handler.cc:
  No inline methods in bit interface (caused strange bugs)
  initialise method
sql/handler.h:
  Changed to bitvector from bitmap
  Removed init variable
sql/opt_range.cc:
  Removed all extra HA_EXTRA_RETRIEVE_*
sql/sql_acl.cc:
  Removed all extra HA_EXTRA_RETRIEVE_*
sql/sql_base.cc:
  Set bits previously missed
sql/sql_insert.cc:
  Removed all extra HA_EXTRA_RETRIEVE_*
  Timestamp handling
sql/sql_load.cc:
  Updated comments plus set all bits in bitvector
sql/sql_select.cc:
  Removed ifdef since NDB and Federated needs the same calls
  Added comment or rather changed comment.
sql/sql_table.cc:
  Removed HA_EXTRA_RETRIEVE_* calls
  Updated comments
sql/sql_udf.cc:
  Removed HA_EXTRA_RETRIEVE_* calls
  Updated comments
sql/sql_update.cc:
  Removed HA_EXTRA_RETRIEVE_* calls
  Timstamp updating