changed new staticpages action to index
user flow for front page, user signup ajaxified
removed user name validations

The user no longer needs to signup with his/her name, they can edit their name later from the profile page
front page logic
moved signup form into a partial
moved sign in into a partial
yield method in the layouts to have page specific javascript
css to hide the signup form on page load

This is because I want to toggle between both forms
links to login/signup toggle
coffeescript to toggle between signin/signup form