add profile page test to user_pages_spec.  add factory girl gem to gemfile and bundle install
failing profile page test spec
add code to pass profile page spec
lower bcrypt's cost function in test.rb
add gravatar User helper method.
add profile page styling
create sign up tests in UserPages spec
add strong params
style and present error messages if any
redirect_to user in User controller
Finish user signup
Add SSL in production
correct error with welcome msg
add size parameter to gravatar_for.  optimize flash code
create tests for verifying signup pages render correctly
create Authentication controller and spec test
create sessions routes
add appropriate actions to sessions controller
create new view for sessions
test for signin failure