Strengthen an existing spec and add specs for exported functions
Strengthen an existing spec and add specs for exported functions

This module contained a very general spec for a behaviour callback.
Besides strengthening it, specs for all other exported functions
were added.  While at it, took out unnecessary include attribute.

ktkt2009/disco,mozilla/disco,seabirdzh/disco,ktkt2009/disco,discoproject/disco,seabirdzh/disco,pavlobaron/disco_playground,pavlobaron/disco_playground,seabirdzh/disco,pooya/disco,pombredanne/disco,pombredanne/disco,pombredanne/disco,mozilla/disco,beni55/disco,scrapinghub/disco,mwilliams3/disco,discoproject/disco,oldmantaiter/disco,seabirdzh/disco,ErikDubbelboer/disco,ErikDubbelboer/disco,seabirdzh/disco,ErikDubbelboer/disco,ktkt2009/disco,oldmantaiter/disco,mozilla/disco,ktkt2009/disco,simudream/disco,simudream/disco,pavlobaron/disco_playground,scrapinghub/disco,beni55/disco,mwilliams3/disco,pombredanne/disco,discoproject/disco,simudream/disco,pombredanne/disco,pooya/disco,scrapinghub/disco,simudream/disco,mwilliams3/disco,ErikDubbelboer/disco,mozilla/disco,ErikDubbelboer/disco,beni55/disco,oldmantaiter/disco,scrapinghub/disco,pooya/disco,discoproject/disco,mwilliams3/disco,pavlobaron/disco_playground,beni55/disco,simudream/disco,mwilliams3/disco,ktkt2009/disco,beni55/disco,oldmantaiter/disco,pooya/disco,discoproject/disco,oldmantaiter/disco