Rework/Enhance Reservation API

[tazend]

Classes

• [ ] Reservation class wrapping all members of the C-struct as properties.
• [ ] Reservations class, acting as a custom collection (dict) to retrieve all Reservations, while also holding all the Reservation instances which carry the actual information for the invidiual reservation.

General Functionality for a Reservation

• [ ] create
• [ ] modify
• [ ] delete
• [ ] get (getting a single reservation)

Other

• [ ] Documentation
• [ ] Write tests
• [ ] Write examples