bzr提示：
You have not informed bzr of your Launchpad ID, and you must do this to
write to Launchpad or access private data. See "bzr help launchpad-login".
解决方法：
bzr登陆加密
bzr launchpad-login <username>
登陆launchpad以后编辑SSH keys
方法:
https://help.launchpad.net/YourAccount/CreatingAnSSHKeyPair
