Application helper tests in Rspec
User model with validations and pw authentication; specs
 - added the i18n config line to application.rb to get rid of the deprecation warning
 - generated a User model with:
   - a before save callback to convert all emails to lowercase
   - validations on name (presence), email (presence, format, uniqueness),
     and password (length)
   - has_secure_password behavior
   - unique index on the email column.
 - added bcrypt_ruby to the Gemfile (required for has_secure_password)
 - added lots of specs to enforce password and authentication functionality.
Tidy up Gemfile; manual annotations
  I installed the annotate gem, but it doesn't allow me to reorder
  column. This is a dealbreaker, so for now I'll annotate models manually.
  I'll consider contributing a feature add to the annotate gem once I'm
  more confident.
Install SimpleCov
  I'm excited by SimpleCov's simplicity and friendly interface,
  but in initial testing, it tells me that I have 100% test coverage
  of my code. Even when I remove all tests from user_spec.rb.
  Some minor spec fixes
  Hid /coverage/* from Git
Installed Haml, converted one template
  Converting to Haml is more effort than I had expected!
Switch from Haml to Slim templating
	I don't like Haml syntax. I find it bulky and awkward to work with.
	Slim appears to work similarly and have all the same advantages of Haml,
	so I'm using Slim exclusively from now on. All templates are updated and
	working properly.
User signup & show; validation errors; flash alerts
	- add gem factory_girl
	- add specs for user signup area
	- add sitewide styling for forms and Gravatar images
	- new, create, and show actions for User controller
	- sitewide helper and partial for object validation errors;
	  this can be implemented with a one-line call in each validated form.
	- sitewide support for displaying Flash messages (automatically
		displayed in application.html.erb)
Turn on sitewide SSL in the production environment.
Rename application.css to application.css.scss