create a create_db
Merge branch 'master' of https://github.com/wmantly/RPN-game into model_rpn

Conflicts:
	model.py

mergin changes to master into model rpn
Merge pull request #10 from wmantly/model_rpn

Model rpn
Merge pull request #11 from wmantly/views

view, may not work
Merge pull request #12 from wmantly/views

view, may not work
show_rpn
Merge branch 'master' of https://github.com/wmantly/RPN-game into views