project validations. add model test
Merge pull request #10 from RailsMafia/feature/validation

project validations. add model test
replace UserModel#own_projects by scope ProjectModel#owned
Merge branch 'dev' into feature/scope
Merge pull request #11 from RailsMafia/feature/scope

replace UserModel#own_projects by scope ProjectModel#owned
Merge pull request #12 from RailsMafia/dev

Add validators and scopes to models