move menu divider element to class.
create and index event changes.
send change email.
update settings example.
fixed: rails ignore bcc email attributes.
don't use bcc, the bcc users will see the first user(to)'s email address.'
fixed rspec error.
test taobao rubygems repo.
fixed: /flash/clippy.swf 404 error.
show event menu tip. close #370
refactor javascript file, use standalone js file instead of put them to application altogether.
new event can copy from others.
Merge pull request #378 from saberma/saberma-feature/358-change-notification

主办者可以向所有报名用户发送临时变更通知
merge.
Merge pull request #380 from saberma/saberma-enhancement/372-copy-event

主办者发布新活动时可以复制以前的活动信息
add change log to readme.
send sms to participants.
event change send sms test.
Merge pull request #388 from saberma/saberma/changelog

项目主页显示近两月变更记录.
fixed rspec error.