Setup CSV input plugin setup

Please reference http://www.embulk.org/docs/built-in.html

it's easier to get the config.yml file from guess and moving forward from there.

Change the "path_prefix" part in the following

in:
  type: file
  path_prefix: "/Users/randy/GitHub/embulk/try1/csv/part-"
  parser:
    charset: UTF-8
    type: csv
out:
  type: stdout

Used following command to get config.yml

embulk guess example.yml -o config.yml

Change the csv related field in config.yml

in:
  type: file
  path_prefix: /Users/randy/GitHub/embulk/try1/csv/part-
  parser:
    charset: UTF-8
    type: csv
    newline: CRLF
    delimiter: ','
    quote: '"'
    escape: '"'
    trim_if_not_quoted: false
    allow_extra_columns: false
    allow_optional_columns: false
    columns:
    - {name: sourceIP, type: string}
    - {name: destURL, type: string}
    - {name: visitDate, type: timestamp, format: '%Y-%m-%d'}
    - {name: adRevenue, type: double}
    - {name: userAgent, type: string}
    - {name: countryCode, type: string}
    - {name: languageCode, type: string}
    - {name: searchWord, type: string}
    - {name: duration, type: long}

Next step: setup BigObject output plugin