add unfinished scope in event model
create event_usership table
let the user and event associated with the event_usership
run rake db:migrate command to create table in database
join event is work now
add test code by EventsController#join method
Merge pull request #190 from ywjno/issuse_189_one_more_thing

给event添加一个unfinished的scope
update rails to 3.2.11
add initialization account by seed
Merge pull request #195 from flypiggy/feature/194-update-rails-to-3.2.11

update rails to 3.2.11
add initialization account
Add uploadable input
Don't add empty line when textarea is empty
Use uploadable input
Merge pull request #196 from caok/issue/193-add-initialization-account

add initialization account by seed
Use mixin instead of copying
Remove unnecessary class
Remove unnescessary styles
Tweak css
add time merge for event. #162