This line is no longer being used.
The call to the on_release callback is not any different than the others, so this if statement is not necessary.
on_release needs to be documented in the gh-pages branch.
Don't bother slicing up the array if we know it's going to be short to match anything.
Some renaming for clarity.
Fix is_exclusive bug.
Squeeze in is_solitary feature for 1.0.6.