#2 MD5 comparison report fails if NSRL is not present

[David Collett]

The MD5sum report, which does file-typing and hash
comparison fails if the NSRL hash database is not
present. It should work regardless and still display
file-types. Solution is for default database (db.setup)
to contain empty NSRL tables.

[Michael Cohen]

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Table creation SQL added to db.setup - should now be created
when pyflag is installed.