fix some problems with the turns getting stuck. also display the how big the pot was at the end.
remove the save stuff.  make values from api part of the class itself along with the price.
fix case where this will crash if a person doesn't exist
start on a stock game
use the name positions because portfolio was used for something else before. it'll be an error if there is already data in mongo and the types are different.
clean up
add short and cover
Merge pull request #19 from kenrobbins/master

minor holdem fixes, start on a stock game