README: Note support for scrypt.
README: Note support for scrypt.

Change-Id: Ia43c9ffa98d9a78d636990a190360c09c5cdd16f

toshnix/camlistore,toshnix/camlistore,toshnix/camlistore,toshnix/camlistore,toshnix/camlistore,toshnix/camlistore,toshnix/camlistore,toshnix/camlistore,toshnix/camlistore