Add new kind of opponent, reinstate use of fixtures.
Added checkbox to intentionality page.
Added mturk form. DOES NOT SAVE ANYTHING YET!!!
Extended questions script with some sensible options.
Store opponent intentionality per round.

While there, guard the intentionality and "start round" pages against page
refeshing. A GET request must not modify server-side state!
Randomized intentionality.
Merge branch 'master' of https://github.com/maikelsteneker/ultimatum_game

Conflicts:
	game/templates/game/intentionality.html
	game/views.py

Intentionality checkbox might be broken.
Fixed the intentionality. Made a different case for the randomness opponent.
Unique offers for each intention.