initial user controller and test
initial user table with unique email index
bcrypt for secure passwords
suppress I18n warnings
initial user model and specs
disallow double dots in emails and tidy up before save
Merge branch 'feature/users' into develop

* feature/users:
  disallow double dots in emails and tidy up before save
  initial user model and specs
  suppress I18n warnings
  bcrypt for secure passwords
  initial user table with unique email index
  initial user controller and test