Add support for having nfldb in non-public schema about nfldb

[leonardb]

See pull request #16

[leonardb]

I think in the long run wrapping the various execute functions in the cursor to do the replacements may be a cleaner option, but I'm at a bit of a loss as how to achieve this when an 'extra' cursor type (Dict I believe) is being used.

I would think maybe approaching it in a similar manner to the logging cursor, except parsing and rewriting the query may work.

[BurntSushi]

It seems like you might be able to fix this with a solution outside of nfldb: http://stackoverflow.com/questions/2875610/postgresql-schema-path-permanently --- Do any of those solutions work for you? If not, why? Maybe we can figure something else out.