create Member model
Merge branch 'master' into create-model
add unique setting
add presence type
add vote model
fix typo
add vote model
make schema.rb from db:migrate
Modify mistakes on vote.rb
Modify old hash syntax
add unique index
Update schema.rb by db:migrate
add uniqueness to member-uid
destroy uniqueness index
Add unique index to members
Modify old hash syntax
Add unique index to votes
Update schema.rb by rake db:migrate
Add unique to member model
Add uniqueness to vote model