delete erb files
create haml files
to_haml conversion script
haml rake script
rename application.css

create application.scss, add import of fonts.
add some basic css
add application helper for title
add sign in/up links
add a basic footer
add basic layout with grids
migration: create roles
migration: habtm user roles
add name and surname to users
user model: roles and habtm
role model
schema after migrations
seeds for roles and admin
add tags in seeds
add two flash messages
add links sign in/up/out