add support for loading the presenter's current slide upon initial load
add support for loading the presenter's current slide upon initial load

[[id:e98028ee-32ce-4741-9563-c21b6ced5ac2][endpoint to track current presentor state]]

BirdseyeSoftware/talks.polyglot.jan2013,BirdseyeSoftware/talks.polyglot.jan2013,BirdseyeSoftware/talks.polyglot.jan2013