Add Ignored type for marshalling.

Ignore-this: da5f3f58f4d2df7943b78b71a9772f6c

darcs-hash:20141007213130-4d2ae-cba56ac37e4a41254740f09ae3b230f05d06254c
Add support for passing a model from QML to the Canvas.

Ignore-this: 43c5088b320b384a04e0072bf447c684

darcs-hash:20141007213350-4d2ae-0b9eace32b358972cd952818f5e435ec83a470f8