Fix UTF8 encoding problem.

Created by: SaitoWu

Relate to:

https://github.com/gitlabhq/gitlabhq/commit/cda5e66d7c190e852b23caca17d90df43d91d75e#commitcomment-2107925

update

We have two problems:

backend => ruby and frontend => coffee

This PR will fix backend problem

need to fix jquery.history plugin to solve the frontend problem

cc/ @tsigo