Add Card model and add card option in payform of receipt
Add cards in payform of receipt finish, not ready yet
Finish incorporate credit card to payform of receipt
Add annul field to Card model
Add destroy dependency of documents objects
Add annul field to Cehck model
Add annul field to Item model
Change destroy method of card controller
Add annul field in card model
Add field annul to accessors in check and item models
Merge pull request #35 from PlumLabs/av-add-destroy-association

Av add destroy association
Merge pull request #34 from PlumLabs/av-add-credit-card

Av add credit card
Merge pull request #36 from PlumLabs/add-annul-field-to-check

Add annul field to check
add current account