Generate users model and migrate SQLite db.
Add examples to user model spec.
Implement some validation on user info using TDD.
Enforce email address uniqueness.
Add password digest to user model.
Implement secure password in user model,
Add password requirements and test password implementation.
Test for saving emails in downcase.
Refactor before_save callback.
Improve accuracy of email regex.
Merge pull request #3 from reynoldsbd3/modeling-users

Modeling users