The description handling is not suitable for multi-site installations

As currently set up the getDescription() function in requestinvitation.module get's the description from a string within that function. To change the description, one is instructed to change the string that gets assigned to the $description variable.

This is fine for single site installations but unsuitable for multi-site installations unless one has a separate copy of the requestinvitation module in each site specific module folder, which defeats the purpose of the ../sites/all/modules directory.

The description should be stored somewhere other than the requestinvitation.module and be configurable through the admin UI to support multi-site installations.