1. comment and topics

by zxh
Merge branch 'master' of https://github.com/gokobo/gokobo

Conflicts:
	Kobo/kobo.rb
	Kobo/views/topic.erb
Merge branch 'master' of https://github.com/gokobo/gokobo
Merge branch 'master' of https://github.com/gokobo/gokobo
layout signin signout
Merge branch 'master' of https://github.com/gokobo/gokobo

Conflicts:
	Kobo/models.rb
Merge branch 'master' of https://github.com/gokobo/gokobo