added nutrient factory
refactored spec with controller macros
point to rails 4.1 stable
added nutrients model
added has_many nutrient
added exception handler
added controller macros
added should not authenticated and spec for exception handler
refactored spec
added nutrient controller and specs
view scaffold for nutrient
added index macros
added rand to username to prevent duplicated name generated
added find_nutrients
added index action
added page params and index spec
fixed indentation
fix spacing
added views for nutrients
added ingredient compositions features