Added PotionIndexes
Added search models for Ingredient and Book
Merge branch 'david-search' of https://github.com/Kae7in/cs373-idb into isabella_search_models

Conflicts:
	hogwarts/marauder/search_indexes.py
Added text files
Merge pull request #373 from Kae7in/isabella_search_models

Models for Potion, Book, and Ingredients.