added shop link to header
only let them order one thing (for now)
modify seeds.rb to use integer prices
added ability to delete current order
added order completion (very basic for now)
added account_details table, set up abilities

also tweaked some order/order_item related abilities
give each member an account_detail entry
Marked failing order_item test as pending

These are failing because we set CanCan to not allow these actions.  We
might want to delete them entirely, actually, but I'm not quite sure
yet, so for now I'm just marking as pending.
deleting spurious model file left over from old work
added account_types, fixed a bunch of tests
account details: there can only be one

Set up a validation to make sure there's only ever one account_detail
attached to a member.  This broke a bunch of tests, and means you
basically can't use a factory to generate account details.  Instead, to
test account details, create a member and then look at their account
details.
seed account types; require name too
only admin can read/manage account types
added account type and paid months columns to product
validate paid_months (must be integer)
rename account details to just account
added is_paid? method to member
added method to update paid acct details after product purchase
added update_account method to order
Call update_account when you complete an order.

Also had to tweak product.update_account to actually save the account!