Having a distinct class just for that was a bit overkill

Rename classes to (hopefully) clearer names while we're doing that.

Fix the /projects/:id/repository/commits endpoint to handle dots in the ref name when the project full path contains a `/`

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

Repository#commits is expensive because it has to use Rugged to walk the Git
tree as opposed to doing a direct ref lookup.

Improves performance in #34533

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

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

Jordan Ryan Reuter authored 8 years ago and Oswaldo Ferreir committed 8 years ago

`Kaminari.paginate_array` takes some options, most relevant of which is
a `total_count` parameter. Using the `commit_count` for `total_count`
lets us correctly treat the return of `Repository#commits` as a subset
of all the commits we may wish to list.

Addition of a new `Repository#commit_count_for_ref` method was
necessarry to allow the user to start from an arbitrary ref.

Ref #1381

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

add docs and tests - add additional validation
allow move without content
updated response

So we have raw_diffs too

This reverts commit 3e991230.

# Conflicts:
#	app/models/project.rb

- Parameter validation as ISO8601 format