refactored add and remove features so that it can be used in both create and update actions
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jay-r
added admin controller with menu action
modified start_year of _form partials in albums and artists
added some artists and albums
modified albums to show it's price
added album images, normalise and h5bp css templates, and modified albums index
added migration to add image_path to album
modified album covers
included .DS_Store in git ignore files
formatted published-date and price using strftime and number_to_currency
modified albums index appearance
modified feature show.html to include all albums and artist that contains the feature
added Public controller that lists all albums
sorted public albums by title ASC
added Add to Cart placeholders to public albums