create tables, models, associations
add tests
connect to travis
changed ruby version on .travis.yml
add db.yml :)
delete db.yml, sercets.yml
travis fix
fix travis#2
remove some migrations
fix travis#3
deleted
remove db.yml and fix travis config
fix associations, tests
fix bugs
remove db.yml
fix bugs #2
add validations
Merge pull request #2 from antonsokolskyy/development

#hw11