better handling of current branch name

pkg/commands/branch.go

@@ -3,7 +3,9 @@ package commands
 // Branch : A git branch
 // duplicating this for now
 type Branch struct {
-	Name         string
+	Name string
+	// the displayname is something like '(HEAD detached at 123asdf)', whereas in that case the name would be '123asdf'
+	DisplayName  string
 	Recency      string
 	Pushables    string
 	Pullables    string