Added Seed Values and Associations

Has many and belongs to: 
Pantry <--->  Ingredient
Recipe <--->  Ingredient

Pantry belongs to User

Seed Values are added:
1 user has 1 pantry
1 pantry has 2-3 ingredients
there exists 2 recipes
1 recipe contains 1-2 of that one user's ingredients
the other recipe has no ingredients in common with the user