Ignore .DS_Store
Add module description
Factor out header generation
remove line noise
remove a bad joke
Add poll handler for clients to check orders.
more logging
add memoizer for singleton functions with optional arguments
register shortlink only once
Factor out base_url generation from request.
Order generation with the same shortlink + argument
Fixed shortlink registration.
remove unused _issue_shortlink
price -> amount
Implement payment capture
short links -> transactions. Add status and transaction_id
fixed polling logic
fixed hashing
fixed shortlink handling
fixed customer id