fix posts_in_post_dir dir bug
integrat disqus and duoshuo
little update, fix Config changed bug
remove $config[blog_url], use BLOG_URL instead
refactor function name to c style
add default arg to TriggerHook, add RemoveHook
rename NS_TEMPLATES to NS_TEMPLATE, remove config active_template, use [template][active] instead
use json and base64 to store description data, change var name in Save
true for json_decode to assoc array