Cage System does not use InnoDB tables, thus no foreign keys

[Julian Lam]

Chose MyISAM only because I didn't know better - foreign keys would allow for
more server-side reliability, instead of relying on PHP code as with the MyISAM
table.

Not a major problem, since I designed around it, but it should be fixed in the
future.

[Julian Lam (julian-lam)]

InnoDB also supports transactions, which may be important (even critical) for accessory sales.

Informally targetting to v1.0

[Julian Lam (julian-lam)]

As MySQL supports table-type mixing, the following tables require changing to the InnoDB engine:
authz
contracts
accessories (for transaction support)