[WIP]Start implementing back button and breadcrumbs.
Add back button in any pages.
Add breadcrumbs function.
Integrate Japanese title and breadcrumbs
Merge from master.
Merge branch 'master' of https://github.com/TheBigBoss2005/SUL into back-and-breadcrumbs
Merge pull request #18 from TheBigBoss2005/back-and-breadcrumbs

Start implementing back button and breadcrumbs.