remote: add Push (#178)

* remote: add Push.

* add Push method to Remote.
* add method Push to Repository.
* examples: add push example.

* requested changes

* add tests, fixes

1 files changed, 22 insertions, 0 deletions

diff --git a/examples/push/main.go b/examples/push/main.go
new file mode 100644
index 0000000..9a30599
--- /dev/null
+++ b/examples/push/main.go
@@ -0,0 +1,22 @@
+package main
+
+import (
+	"fmt"
+	"os"
+
+	"gopkg.in/src-d/go-git.v4"
+	. "gopkg.in/src-d/go-git.v4/examples"
+)
+
+func main() {
+	CheckArgs("<repo path>")
+	repoPath := os.Args[1]
+
+	repo, err := git.NewFilesystemRepository(repoPath)
+	CheckIfError(err)
+
+	err = repo.Push(&git.PushOptions{})
+	CheckIfError(err)
+
+	fmt.Print("pushed")
+}