The Mac FS is case insensitive, so naming the primer the same as the standard
module caused a conflict.  This renames the primer and adds a note pointing to
the new primer in the ones that also used the Random module.
Merge pull request #463 from lydia-duncan/fixMacPrimerFailure

Fix Mac primer naming conflict

The Mac FS is case insensitive, so naming the primer the same as the standard
module caused a conflict. This renames the primer and adds a note pointing to
the new primer in the ones that also used the Random module.