a rough homepage mockup.
introduce bootstrap.
add homepage.
small change.
introduce font-awesome.
add login/signup switch.
finish user regist.
add static page layout.
introduce table_print.
finished simple regist and auth.
Merge pull request #1 from RubyNewbies/feature_user_auth

Feature user auth
add some icons
update to rails 4.1.6
fixed login error.
introducec user center.