'Rename project and rename its root path accordingly.'

def rename(self, new_name):

    old_name = self.name
    self.name = new_name
    pypath = self.relative_pythonpath
    self.root_path = (self.root_path[:(- len(old_name))] + new_name)
    self.relative_pythonpath = pypath
    self.save()
