Player side is pretty much finished!

NOTE: I had to mess around with the migrations again, so you might need
to delete all the files out of pluvali/CopingGame/migrations before
copying the files over.

I had to change a little in the models, removed the ManyToMany through
attribute. The ER diagram should still be right though, I don't think I
drew it right for the through attribute. A player can now see only one
of each scenario instance from the scenario index page, answer through a
total of 5 problems (i kind of had to make a hack fix for these to show
up right, so I made a limit to 5 problems per scenario- ER diagram
doesn't show this), and then is redirected to a quick victory screen i
made.