Fixes for Zidisha.sql

All the tables should use the same storage engine; Can't see an advantage in Zadisha's to use MyISAM on any table.

Shouldn't be using latin1 on tables.

Removal of the auto_increment=1 for consistency because there already is tables like disqus_comments that do not list it; MySQL will default to auto_increment=1 on new creation of tables.

Removal of auto_increments that do not have inserts in the .sql file such as referrals because it is bad practice to have an auto_increment that isn't tied to inserts.