added TradeOffers activity
trade action bar button launches trade offers activity and pulls in json
changed uri for OfferedTrades to include embedded items
Gson parses TradeProposals from json
Lists Trade proposal offered items
added sought item and trade status to offered items list
added color coding of trade statuses
refactored TradeProposal method getStatusText()
added tradeofferdetail view
detect clicks on accept and reject trade buttons
change OfferedTrade Parse security to allow status change by recipient
changed accept/reject buttons to only display for proposed trades
added communicate button when trade has been accepted
chat activity launches from communication button