$transition not returning promise correctly

[christopherthielen]

from @shanesmith in #150

Also running into @jvisser's issue so I've created a plunkr below.

http://plnkr.co/edit/po3jqSI7swYrAVaUFwxj?p=preview

Some quick sleuthing tell me that the bug is somehow related to https://github.com/christopherthielen/ui-router-extras/blob/master/src/transition.js#L43 and how it's used a few dozen lines below, probably should be returning data instead...

[shanesmith]

Cheers!