Add test_pair_seeds_all_possible_pairs() to assert if all words are in the lexicon the seed's pair is returned.
Add test_pair_seeds_one_possible_pair_due_to_punct() to assert only strings without stop characters are returned.
Add test_initialize_bot_is_untrained() to assert chatbot is untrained when instantiated (formorly test_initialize_bot). Revise test_initalize_bot to assert that an instantiated chatbot is of type Chatbot
Merge branch 'deployment' of https://github.com/corinnelhh/chatbot into deployment