made AvailableItem model parcable
AvailableItemDetailFrag opens on click from AvailableItemListFrag and replaces it
added onclicklistener to propose trade button on AvailableItemDetailFragment
added login layout
blank login screen appears on trade proposal
LoginActivity adds LoginFragment
LoginFragment layout displays properly now
login working
login and logout working
redirects to AvailableItem detail view on successful login
proper login on activity result handling