Refactored OffenseTurn to make constructor function define only
attributes. Define instance methods on prototype outside constructor
function.

Began refactoring out DefenseTurnView. Functions when called manually.
Need to make DefenseTurnView/OffenseTurnView more exactly parallel.
Look at structure of 'results' object returned by respective Ajax
requests.
results.results/results.coord in OffenseTurn, results.hit/results.coord
in DefenseTurn. Like results.hit better.

Then look at refactoring out what is common between Turns and TurnsViews.