Refactored/styled Artwork Requests:

For Controller, left TODOs for further review

For Model, refactored max_print_area (also refactored it in Jobs Model)

For Views, formatted indentation, line breaks, etc., used first instead of [0], removed 'ar' for 'artwork_request' to be more descriptive, same for 'a' and 'asset', formatted selected/checked

For Coffeescript, left TODOs for further review

For Spec, edited tags for artwork_requests_spec and added max_print_area spec for artwork_requests since for some reason it didn't already exist