Add primary keys to every table

[dfabulich]

A bunch of tables have no primary key, making it very difficult to work with these tables. We should add a computed primary key to allo of them.

List of tables with no primary key

select table_name from information_schema.tables where table_schema='ifdb' and table_type='BASE TABLE' and table_name not in (select table_name from information_schema.columns where table_schema='ifdb' and column_key='PRI') order by table_name;
+------------------+
| table_name       |
+------------------+
| audit            |
| clubmembers      |
| compgames        |
| compprofilelinks |
| comps_history    |
| downloadhelp     |
| extreviews       |
| formatprivs      |
| gamelinks        |
| gameprofilelinks |
| games_history    |
| gametags         |
| gamexrefs        |
| iso639x          |
| logins           |
| nonces           |
| osprivs          |
| playedgames      |
| pollcomments     |
| pollvotes        |
| privileges       |
| reclistitems     |
| reviewflags      |
| reviewtags       |
| reviewvotes      |
| tagstats         |
| unwishlists      |
| userfilters      |
| wishlists        |
+------------------+

[dfabulich]

This will make it easier to port to InnoDB #1016