Updated docs to reflect minor changes in `ia` script, and changed style of example to correspond to the docstrings in `ia`.
Updated docs to reflect minor changes in `ia` script, and changed style of example to correspond to the docstrings in `ia`.

wumpus/internetarchive,JesseWeinstein/internetarchive,brycedrennan/internetarchive,dattasaurabh82/internetarchive,jjjake/internetarchive