Revert "Don't tempt people with this public interface"

This reverts commit e3b0b91912.

server/manager.go

@@ -46,6 +46,12 @@ func NewEmptyManager(client remote.Client) *Manager {
 	return &Manager{client: client}
 }
 
+// Client returns the HTTP client interface that allows interaction with the
+// Panel API.
+func (m *Manager) Client() remote.Client {
+	return m.client
+}
+
 // Put replaces all of the current values in the collection with the value that
 // is passed through.
 func (m *Manager) Put(s []*Server) {