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.

val cache01 : unit -> transaction page
val cache10 : unit -> transaction page
val cache11 : unit -> transaction page
val flush01 : unit -> transaction page
val flush10 : unit -> transaction page
val flush11 : unit -> transaction page