Specify event listener target
Fetch new post directly
Fix bug that delete link open new window
Fix footer position on posts#index
Change format on posts#create
Update join/leave button layout & design
Add user menu on navigation bar
Update top page description
Show post.content with simple format
Add navigation on posts#index
Fix poltergeist timeout
Fix warning message

WARN: tilt autoloading 'coffee_script' in a non thread-safe way;
explicit require 'coffee_script' suggested.
Change pusher.js to CDN
Wait for too heavy javascript loading
Merge branch 'improve_navigation'