Shorten function names
Move dbGetStatement to results.r.
Also correctly use new dbGetInfo interface
Don't use Sint
RS_DBI_getManger doesn't need an argument
driverInfo doesn't need mgrHandle
There is only one driver (aka manager)
Singleton manager doesn't need an id
Managers don't remember connections.
And haven't for a long time
Driver name is always SQLite
Don't need length either
Tidy up init & shared cache setting
Tidy up RS_SQLite_closeManager
Move all manager code into RS-SQLite.c
Better names for driver functions
Remove misleading comment
Connections and results don't need to capture mgr id
No longer need to access process id