Force the project name to a string or path.resolve will ignore it later.

Without this exports with only digits in their name cannot be exported as path.resolve ignores non-string arguments are ignored [http://nodejs.org/api/path.html#path_path_resolve_from_to]

This just forces the argument to a string when it is read from the command line.
Without this the error occurs at models/Project.server.bones:164.