#1 Extend Course More than Once

[karlabbott]

It should be possible for the user to extend a course more than once. The user should not be able to extend the course more than 2 times the length of the original course or something on those lines, but they should be able to extend more than once.

[Patrick Connelly]

Moving this to RFE. Probably will attack with a configuration setting either allowing X number of extends. Just flat out allowing extending indefinitely seems prone to gaming, and I'm not sure what the best approach should be.