如下情况为通过URL安装第三方Package
1、sfdc不会验证子域名
即拿到第三方Url后缀即可安装，如packaging/installPackage.apexp?p0=xxxxxx，以下都可以
2、出现错误Missing Organization Feature: AccountTeam
Customize>Accounts>Account Teams启用Account Teams，
3、出错Accounts Missing Organization Feature: Account.Sharing
Administer>Security Controls>Sharing Settings选择Account设置Account and Contract为Private
