在Visual Studio 2015中发布时如何避免从数据库中删除图表

I've got a SQL Server 2014 database project in VS 2015. I've also created a couple of schema diagrams in SSMS (since VS doesn't have any schema diagramming that I'm aware of). It's early in the project's lifecycle and plenty of refactoring occurs. The SSMS diagrams are good at updating themselves in the face of change - which is really nice. I'd like to preserve the diagrams on (re)publish in the dev environment.I've got a SQL Server 2014 database project in