redirect to offer list
Filter by offer id
Edits work, all offers return the same items
All relationships working
Empty view for offers + image previews work
Remote saves
Fix image loading;

Conflicts:
	CrossRoads/app/src/main/java/com/codepath/crossroads/Utils.java
	CrossRoads/app/src/main/java/com/codepath/crossroads/activities/donors/DonorOfferActivity.java
Better placeholder
Remove redirect
Merge pull request #36 from CrossroadsAndroid/offer_flow_changes

Offer flow changes