Git: added rename branch

Change-Id: I327a2bc91b871dc03797d9af52bb2d32be8e76d2
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>

src/plugins/git/branchdialog.h

@@ -68,6 +68,7 @@ private slots:
     void add();
     void checkout();
     void remove();
+    void rename();
     void diff();
     void log();
     void merge();