adds ingredients to grocery list
adds ability to add ingredients to a grocery list
Merge branch 'master' into add_ingredient_to_grocery_list

Conflicts:
	app/views/recipes/show.html.erb
Merge pull request #46 from tararoys/add_ingredient_to_grocery_list

Add ingredient to grocery list
adds ability to delete item from grocery list
Merge branch 'master' into delete_from_grocery_list
removes grocery list when all ingredients are deleted
Merge pull request #47 from tararoys/delete_from_grocery_list

Delete from grocery list
merging with updated master