RFC: Added option 'createIfPathInexistent'. #135

[19h]

Added option 'createIfPathInexistent' to recursively create a path to the given database if it doesn't exist. Includes changes in documentation and is tested.

Implements the feature as discussed in #135.

[19h]

Fails at leveldown-substitution-test.js since /somewhere/not/writable/booya! doesn't exist.

[rvagg]

@KenanSulayman as @juliangruber said, this is far out of the scope of LevelUP, and as you've discovered with leveldown-substitution-test.js, LevelUP doesn't necessarily even need to be run with a filesystem backend--version 0.9 is going to decouple it from LevelDOWN in fact so you can use it with an in-memory backend (memdown), a browser back-end (level.js) or something else.

If anything, this is a LevelDOWN thing, but even there, I'd still argue that it's out of the scope of what we're doing there--which is exposing LevelDB functionality.

The best we can do is work towards fixing the stupid error message in LevelDB itself. This has come up before and I think we ought to submit a patch to LevelDB to be more helpful in this respect.