pull branch model out into models package

pkg/models/branch.go

@@ -0,0 +1,26 @@
+package models
+
+// Branch : A git branch
+// duplicating this for now
+type Branch struct {
+	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
+	UpstreamName string
+	Head         bool
+}
+
+func (b *Branch) RefName() string {
+	return b.Name
+}
+
+func (b *Branch) ID() string {
+	return b.RefName()
+}
+
+func (b *Branch) Description() string {
+	return b.RefName()
+}