Added Ingredient editing

Improved Ingredient to match Measurement functionality

config/locales/en.yml

@@ -86,12 +86,14 @@ en:
         Sample data row: "Brussels,100[g],other,3.4,300[mg],9".
         Unit given in data row has precedence over that specified in header.'
     form:
-      heading_new_ingredient: 'New ingredient'
-      button_add_nutrient: 'Add nutrient'
+      button_new_nutrient: 'Add nutrient'
       button_delete_nutrient: 'Delete'
+      null_source: '- unspecified -'
       groups:
         other: 'other'
         meat: 'meat'
+    new_form:
+      heading_new_ingredient: 'New ingredient'
     index:
       heading: 'Ingredients'
       heading_nutrient_view: 'Nutrient view'

config/routes.rb

@@ -15,14 +15,13 @@ resources :projects, shallow: true do
           get 'filter'
         end
       end
-      resources :ingredients, only: [:index, :create, :destroy] do
+      resources :ingredients, only: [:index, :new, :create, :edit, :update, :destroy] do
         post 'toggle', on: :member
         collection do
           get 'nutrients'
-          get 'filter'
-          get 'filter_nutrients'
-          post 'import'
           post 'toggle_column'
+          get 'filter'
+          post 'import'
         end
       end
       resources :sources, only: [:index, :create, :destroy]