Support sqlite (no database)

[fidelix]

This is useful specially in a local environment.

database: none
or
database: sqlite
or
database: false

In the config array.

[matthewbdaly]

Another use case for this would be when working on a Statamic site - at least at the beginning, you're probably going to be using the flat file backend, and there's no point starting up a database you aren't going to use.

[eminos]

yes please.