Added self-referential test to wait_list.

For #742
Expanded test a little
Added sort-of-failing test for #754
Another unnecessary stop(). Fix for #743

This was essentially the same bug as #471, fixed in 
https://github.com/EventedMind/iron-router/commit/4f8e64eb889f3c539c754cda2f4bbf8bf6f887a4
Merge https://github.com/EventedMind/iron-router into devel