1) Two small windows cleanups for Archive.
2) Patch from Calvin for Falcon to be able to have its own I_S loaded. One example added for this, does hello world. 


include/mysql/plugin.h:
  Added new I_S type.
mysql-test/r/archive.result:
  Fixed not dropped table.
mysql-test/t/archive.test:
  Added additional drop table
sql/sql_plugin.cc:
  Adding support in for the I_S.
sql/sql_show.cc:
  Added schema type for plugin I_S. Additional loops were added to pop these on to the end of requests.
storage/archive/ha_archive.cc:
  Windwos typo