Feature request: allow using the dash character in package names

[Behrang Saeedzadeh]

Hi,

Unless this is going to be very challenging, I think it would be nice to
allow using the dash character in package names.

At the moment there's no elegant way to create packages with compound
names. Underscore and camel case look don't feel suitable for package names.

So rather than:

* error_handling, or
* errorHandling

It would be nice if we could use:

* error-handling

Best regards,
Behrang Saeedzadeh