[MRH][81377330] WIP photoplus dependencies
[MRH/SB][81377330] pass event data in an object

Ran into issues with listener not receiving
event when data was just a string.
[MRH/SB][81377330] remove mixin from AG

Replace method calls with event-based approach
[MRH/SB][81377330] fix specs

Specs were broken (due to bad fixture and missing AG deps).
Fixed fixture and updated spec to reflect recent changes
that replaced AG deps with events.
[MRH/SB][81377330] fix typo
[MRH/SB][81377330] major version bump

This change is not backwards compatible.
Prior to this change, the code depended on a mixin from AG
to get listing media data.
This version sends an event "uiWantsListingMedia"
with a listingId when it needs media.
It listens for an event "dataListingMediaReady" which should
have the keys "photos" and "floorplans" where each is expected
to be an array of hashes with image "path".
[MRH/SB][81377330] PR feedback tweaks
Merge pull request #9 from primedia/mrh_sb_81377330_photoplus_dependencies

MRH/SB 81377330 photoplus dependencies