Bug Fixes:
  Updating imprintable variants requires both size and color
    Trello card #219, url: https://trello.com/c/q3NMpAat
  Line items only adds sizes that are specified by imprintable
    Trello card #109, url: https://trello.com/c/ZBa4IIwA
  Printing in chrome
    Trello card #224, url: https://trello.com/c/lc8kYPFL
  Imprintable displays multiple imprintable categories if relevant
    Trello card #194, url: https://trello.com/c/HkEtOyaM
  Problem with creating imprintable category
    Trello card #197, url: https://trello.com/c/0l6hy7TO
  Balance in payments tab rounds to two decimal places
    Trello card #198, url: https://trello.com/c/b7zBm0j5
  Fix DOS vulnerability
  Check the return value of save, otherwise use save!
  Move #set_model_collection_hash into Imprintable model
  Move #load_line_itemable into LineItem model
  Remove instance variables in partials
  Set variables in place of referencing params in view