Conflict When Multiple Users Import a Project

[pasetti]

If a user chooses to import a project (embedded within a zip file), the back-end creates a temporary directory with a name which has a fixed part and a part with the current time-stamp. The import file is then unzipped in this temporary directory. If, however, two users make an import project request at the same time, there might be a conflict because they will try to access the same directory.

I should probably add a random sequence to the name of the temporary directory.