First attempt at adding the ability to lend out items
Update docstrings
More work on making items lendable
Add tests for ``lend/create-form/`` URI.
Add ability to view, edit, and delete lends
Flesh out LendTestCase.test_post()
Add class LendIdDeleteFormTestCase
Add class LendIdUpdateFormTestCase
Add class LendIdTestCase
Add ability to make notes about lends
Merge branch 'lend'

It is now possible to lend items to users and make notes about those lends.