more integration wip

Signed-off-by: Julien Sanchez <sumbobyboys@gmail.com>
Little correction on interface and inprovments

Signed-off-by: Julien Sanchez <sumbobyboys@gmail.com>
Merge branch 'develop' of github.com:kapla/scrumbag into develop

* 'develop' of github.com:kapla/scrumbag:
  basic entity