Streams 105

STREAMS-105 | Ensured that the user_mentions entries are correctly structured and that the activity object has the correct ID and content
Ok, the approach that I'm currently taking is to merge them into individual UserMentions objects if the lists are the same size. If they are not, then I'm creating UserMention objects for every entry in both the IDs and Handles lists. I'll ping the dev list to see what everyone's thoughts are.