7.1.1 add debug box
7.1.2 display user info
7.1.3 speed up and green tests running with Factory Girl
7.1.4 add a sidebar gravatar image
7.2.1 red tests for user signup
7.2.2 use form_for
7.3.1 green working form
7.3.2. green signup error messages
7.4.1 finish signup form
7.4.2 add flash content for successful signup