create first two methods

	* alice_normalize will take a string and return an array
	of words included in the string. these words will be
	lowercase and scrubbed of punctuation.

	* alice_unique_words will take a string and run the
	alice_normalize method on it. Then, it will produce an
	array of all unique elements in the outputted array.
define alice_count_words_optional

	* this method will take in the sample_text, and then will
	ask the user if they would like to count all words or count
	only unique words.
create hash with number of normalized words