git: Repository methods changes

To have a more consistent public API, we decided to rename some methods, and add others:

- Commit method renamed to CommitObject
- Commits method renamed to CommitObjects
- Tree method renamed to TreeObject
- Trees method renamed to TreeObjects
- Tags method renamed to TagObjects
- Tag method renamed to TagObject
- Added method Tags that returns tag references
- Added method Branches that returns branch references
- Added method Notes that returns note references
- Added BlobObject method
- Added BlobObjects method

Also, we added more functionality related to references:
- Added iterator to iterate References with a specific filter

Some notes:
- #298

1 files changed, 1 insertions, 1 deletions

diff --git a/_examples/open/main.go b/_examples/open/main.go
index 9174588..d4b54dc 100644
--- a/_examples/open/main.go
+++ b/_examples/open/main.go
@@ -25,7 +25,7 @@ func main() {
 	CheckIfError(err)
 
 	// ... retrieving the commit object
-	commit, err := r.Commit(ref.Hash())
+	commit, err := r.CommitObject(ref.Hash())
 	CheckIfError(err)
 
 	// ... calculating the commit history