added allergens ingredient controller methods
added allergens_ingredients models and index, new views
updated routes and paths
seeded data base with some allergens
user can add allergens to ingredients, next is patient groups
made relationships in model and table for patient groups and recipes, made methods in patient groups to access specific categories of patient groups, building views for recipe form
removed unnecessary controller and views
user can edit recipes and ingredients from recipe show page
changed adding meta and patient group info to recipe to edit_recipe_group method
added logic for all ingredients to be their own allergen by default
wrote some methods show only the patient groups that are safe for a recipe base don its ingredients and allergens for when a dietitian is choosing patient groups for a recipe
added recipe steps
can add a recipe, select characteristics by category, add ingredients from database or create new ones, add allergens to new ingredients and edit already entered ingredients, add patient groups and recipe description, edit recipe after completion.