groupbuddies/theshelf — pull request #40 by zamith (2014-07-29 16:11:03+00:00)
Title: Extend book loan

https://trello.com/c/YX3qCkqT/13-extend-book-loan

By default, loans are extended for 15 days.

Books can only be extend once, and one week before the expiration date
of the loan.

Shows the expiration date for a loan on my shelf.