Adding example test case showing the binding loop with repeaters
Set style's changes count before computing effective properties

This avoids the recursive initSetStyle, which leads to an unnecessary
setupStyle() and the following propsChanged.

Additionally this fixes that the mChangeCount was never cached for root
objects and therefore would lead to a propsChanged signal for each computed
element in an repeater (or listview).
Merge pull request #3 from AbletonAG/fix-binding-loop

Fix binding loop