Added support for CREATE TABLE AUTO_INCREMENT and added more tests. Also non-unique index scans of autoincrement not function.


mysql-test/r/archive.result:
  New Result file.
mysql-test/t/archive.test:
  New tests. Modifies old style 0 to NULL.
sql/ha_archive.cc:
  Added support for scanning non unique indexes. Added support for the AUTO_INCREMENT bit for CREATE TABLE
sql/ha_archive.h:
  Added variables for continueing scans of index_next