[Bugfix] ensure onerror’s are correctly unsubscribed in all scenarios
Merge pull request #255 from tildeio/fix-onerror

[Bugfix] ensure onerror’s are correctly unsubscribed in all scenarios
update changelog
release 3.0.8
short cut for resolved promises
fix for "chained" event
mark next version
Merge pull request #256 from calvinmetcalf/then-shortcut

Then shortcut
small cleanup
handle both fulfilled and rejected then handler fast async path.
remove accidental dependency
update changelog
mark next release
pass jshint

jshint has length as a global variable in the browser, so renaming the variable which is in the asap file to len even though in context it won't be an actually global variable.
Merge pull request #258 from calvinmetcalf/lint

pass jshint
Remove variables that are no longer used
Merge pull request #259 from jcollins1991/remove_unused_variables

Remove variables that are no longer used
[fixes #253] faster denodeify