Signed-off-by: NRémy Coutable <remy@rymai.me>

Closes #1359

Closes #1839

Make the following changes to deal with new behavior in Rails 4.1.2:

* Use nested resources to avoid slashes in arguments to path helpers.

Signed-off-by: NDmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

1. Replace params key 'q' with 'extended_sha1'. A extended SHA1 syntax is explained in 'man gitrevisions'.
2. Change the placeholder of looking for commit.
3. Change the label of ref filter.

@options enable to keep params when switching ref.

Also specify separate project factory for project with filled repo

It uses params[:id] instead of request.fullpath.
It should fix #3132.

Files and Commits render a 404 when running with relative_url_root.

Let's assume your path is = "project/tree/master/This%20Is%20valid"
In this case gitlab renders a 404.

To fix this we should decode the path so that it looks like
"project/tree/master/This Is valid"

Update docs a bit