Add command line configuration options to node server

[jjelosua]

• Fixed some typos
• Fixed CreateFileStream flags option
• Added minimist for handling command line arguments.

Usage: index.js [options]

    A intermediate node web server to cache CSPAN transcript feed

    Options:
      -h, --help           output usage information
      -p, --port           server port
      -t, --transcript     relative path to the file to store transcript
      -s, --skip           if present, skips initial load of the transcript file
      -f, --flags          mode to apply to the transcript file; a: append, w: write