add main user session
working on user
add user test
add user session
add three libs
working on session and resource
add an assignment method to polymorphic module
simple article implemented
working on main, article front
add a layout (common)
move i18n helper to module (i18n_extension)
add awesome font, remove simple form
simple main-article front-end and pageflow implemented
fix a bug of article form cancel button
when create a new artilce, cancel button can't direct to root path correctly
first usable version, v0.1