Refactor to contracts engine#141

Merged

egonSchiele merged 13 commits intoegonSchiele:masterfrom

waterlink:non_intrusive_contracts_v2

May 10, 2015

Commits on Apr 28, 2015

Moved #decorate, #fetch_decorators, #pop_decorators and #decorated_methods to Engine
waterlink
committed
Move out #common_method_added to MethodHandler object
waterlink
committed

Commits on May 4, 2015