possible fix for other users deleting your stuff

I noticed some of the projects I had created on my own account were now blank. It seems that any user with a valid user/pass (even test/test) could delete parts from a project if they could get access to your project(via browse projects.) The server side now checks that the user that created the part is the user deleting the part.

This will not help if you are using the test/test user, so if you are looking to create and keep things, make an account with disposable information (but keep it handy.)