initial_data.rb now don't duplicate records
Add the uniqueness validation to the models
Refactor `validates` in user.rb (move to the new API)
Add indices to existing tables
Add Principles
Merge pull request #1 from zhivotovaaa/master

Table Parameters filled
Add Entities
Merge branch 'master' of github.com:nameless-one/biotriz
Merge branch 'master' of https://github.com/nameless-one/biotriz
test
Merge branch 'master' of https://github.com/nameless-one/biotriz
Table Principles filled