Merge pull request #10 from onesup/new-model

New model
Merge pull request #12 from onesup/new-model

Page model msgpack save.
make get posts UI
change posts pid type 스트링이 맞음.

INSERT INTO `posts` (`created_at`, `pid`, `raw_data`, `updated_at`)
VALUES ('2014-07-23 18:30:11', '323099341166241_416855688457272', '?\0?i
migration file.