added middleware for localization.

related to #44.
i18n for navbar.

related to #44.
added i18n for sidebar.
added i18n for login.
added i18n for key template.
added i18n for add team template.
added i18n for app add team.
added i18n for log.
added i18n for app team.
added i18n for app create.
added i18n for app details.
fixed app details i18n.
added i18n for app list.
added i18n for quota info.
added i18n for add service.
added i18n for service detail.
added i18n for service list.
added i18n for teams info.
added i18n for team list.
added i18n tags.