add user, role, user_role table
signin & signout
ignore `session`
adjust several templates
compass compile
s/signon/signup/g
s/signon/signup/g
change schema
add images for test
building /:index
add intro template
compass compile
redirect to /:index after sync
change schema
create, update, delete related tables
스타일 꾸미기
Merge branch 'user'