A module that will try to require the global fibrous and tell you to install it if it isn't there
The reason for doing this is that you can't require different Fiber modules in the same node process at the same time.
If a user does this wrong, which is easy to do by accident because of the
way that npm works ( https://github.com/laverdet/node-fibers/issues/102 ),
they will see a cryptic error message:
Error: TypeError: Cannot redefine property: future
This module provides a saner error message and clear instructions on how to address the problem.