WL#708: Extend mysql_convert_table_format script

There are couple of ideas which may make this script more useful, this may
result in script renaming as well:

1) add support for -A option to be able to pass over all tablespaces
2) add support for various table options one may wish to set in large chunks:
charset, checksum, pack_keys, delay_key_writes, max_rows  etc
3) add raw support for alter table with specified options to support more exotic
needs.


It would be also good idea to rewrite this script in C using mysqlcheck codebase 
which will make such useful scrip to work under Windows as well.