Create: Deko-Fabrik

The base for two new addons: Deko-Fabrik: Sports and Deko-Fabrik: Office.

• Furniture made of several blocks from any addon now rides Create contraptions in one piece, not only the objects the core knew before. Posters and every existing object ride as before.
• An addon can now offer an object only while another addon is missing. School and Office use this for the office chair, so a pack never has two of them.
• For addon makers: API 1.12 with OnlyWithout, and every MultiCellBlock on contraptions (API 1.11).

Create: Deko-Fabrik 0.2.0-alpha is needed by Deko-Fabrik: School 0.2.0-alpha, Sanitary 0.2.0-alpha, Sports 0.1.0-alpha and Office 0.1.0-alpha. Update the core together with the addons you use; the addons of 0.1.2-alpha keep running on it.

Early release: make backups, and expect changes before 1.0.