更新样式
	deleted:    bbs/static/img/bg_item.png
	deleted:    bbs/static/img/pet.png
	deleted:    bbs/static/img/sendcloud.jpg
	deleted:    bbs/static/img/use.png
为主题表增加作者字段
Merge branch 'master' of http://github.com/puras/moobo

Conflicts:
	bbs/templates/index.html
	bbs/templates/layout.html
	db.sqlite3