add nprogress as bower component
add simple navigation and friendly_id
install public activity & add locale for models
add locales
add default avatar image
merge with upstream/master
Merge pull request #14 from junheon/master

simple_navigation, friendly_id 등 추가
fix migation error
precompile assets
change html to js by following
merge
change large to medium image size
Merge pull request #15 from yeonsik/master

change html to js by following
add nickname in registration form
Merge pull request #16 from yeonsik/master

add nickname in registration form