URI::InvalidURIError: bad URI(is not URI?): select * from

The find method should  be `parsed_url = URI.parse( url )`
currently it tries to `URI.parse(sql)`, not the `url`

``` ruby
def find(sql)
      url = "http://query.yahooapis.com/v1/public/yql?q=#{escape(sql)}"
      parsed_url = URI.parse( sql )'''
```
