Adding bcrypt and scrypt as dependency

Adding bcrypt and scrypt as direct (not development) dependency. Otherwise it produce an error:

```
/var/lib/jenkins/.rvm/gems/ruby-2.1.1/gems/activesupport-3.2.18/lib/active_support/dependencies.rb:251:in `require': cannot load such file -- scrypt (LoadError)
 	from /var/lib/jenkins/.rvm/gems/ruby-2.1.1/gems/activesupport-3.2.18/lib/active_support/dependencies.rb:251:in `block in require'
 	from /var/lib/jenkins/.rvm/gems/ruby-2.1.1/gems/activesupport-3.2.18/lib/active_support/dependencies.rb:236:in `load_dependency'
 	from /var/lib/jenkins/.rvm/gems/ruby-2.1.1gems/activesupport-3.2.18/lib/active_support/dependencies.rb:251:in `require'
 	from /var/lib/jenkins/.rvm/gems/ruby-2.1.1/gems/authlogic-3.4.2/lib/authlogic/crypto_providers/scrypt.rb:1:in `<top (required)>'
 	from /var/lib/jenkins/.rvm/gems/ruby-2.1.1/gems/authlogic-3.4.2/lib/authlogic/acts_as_authentic/password.rb:153:in `crypto_provider'
 	from /var/lib/jenkins/.rvm/gems/ruby-2.1.1/gems/authlogic-3.4.2/lib/authlogic/acts_as_authentic/password.rb:349:in `crypto_provider'
 	from /var/lib/jenkins/.rvm/gems/ruby-2.1.1/gems/authlogic-3.4.2/lib/authlogic/acts_as_authentic/password.rb:244:in `password='
```

See also: 

* http://stackoverflow.com/questions/22894172/rails-server-and-console-fails-to-start-due-to-authlogic-for-ruby-2-0-and-rails
* http://stackoverflow.com/questions/23031902/rails-4-1-0-and-authlogic-bcrypt-issue