By default, this module exports a single function 'prompt'. It prompts the
user to enter some input, and returns an object that represents the user
input.

You may specify various flags to the function to affect its behaviour; most
notably, it defaults to automatically 'chomp' the input, unless the '-line'
flag is specified.

Two other functions are exported at request: 'hand_print', which simulates
hand-typing to the console; and 'get_input', which is the lower-level
function that actually prompts the user for a suitable input.