Priority algorithm no gets stuck

The Priority Fruit algorithm no longer gets stuck by failing to return a
null when no solution is found due to 0 categories being in the priority
listing.

Major algorithms are placed into their own functions.

The player.js file and game.html are modified to store consecutive game
score within the global variables and display them.  Also game has been
set to auto trigger on load and trigger/play each subsequent game after
a completion has occurred.