Fix bug where commit data would not appear in some subdirectories

Fix issue where commit data would not show up in some subdirectories due to escaped slashes. For example:

https://gitlab.common-lisp.net/ecl/ecl/tree/develop/src/gc (now patched with fix)

The upgrade from Rails v4.1.2 to v4.1.9 (76aad9b7) caused slashes in a tree to be escaped automatically. Using a wildcard glob in the route prevents this behavior.

* Closes #1478, #1459
* Closes https://github.com/gitlabhq/gitlabhq/issues/9037

See merge request !581