Cleans up interface (it's now a command line option) and renames project to "sqlcache" in the all-one-word style. Still has issues to do with concurrency, retrying transactions, and foreign function calls that either rely on state or have side effects.

structure M = struct
    con num = int
    val zero = 0
end

structure N = struct
    open M
    con num = num * num
    val zero = zero + 1
end

structure O = struct
    open N

    val one : num = (zero + 1, zero)
end