issue #8: iteration protocol for Instances
issue #8: iteration protocol for Instances

Allow to represent an Instance data as a dictionary where each slot
name is mapped to its value.

Signed-off-by: Matteo Cafasso <43c758619f0ced9dc5c51a50803f3466c86e4c3d@gmail.com>

noxdafox/clipspy,noxdafox/clipspy