Adaptation to rivets 0.6.5

Changes:
1. Now you need to use `model:attribute` notation instead of `model.attribute` - last is consumed by upstream to resolve object properties. Therefore you should to replace `collection:cid` bindings with `collection.cid` to. ^) 
2.  Object methods should be explicitly bound in order to use them as `on-*` event handlers (which are inwoked in the context of <HTML*Element> now).