show unread message count
count unread messages created since the last read of the inbox
add accessTime and unreadMessages properties to state
Merge branch 'inboxcounter' of https://github.com/dominictarr/phoenix into dominictarr-inboxcounter
update access time on inbox open; write access time to localstorage
unread messages now clears when inbox is viewed
Merge branch 'dominictarr-inboxcounter'