Develop frontend templates hierarchy.
Add to url scheme links for render 'home', 'about' and 'tournaments' templates.

On branch dev
	modified:   chess/urls.py
	modified:   main/admin/__init__.py
	new file:   main/templates/main/about.html
	new file:   main/templates/main/base.html
	new file:   main/templates/main/base_fluid.html
	new file:   main/templates/main/base_home.html
	new file:   main/templates/main/footer.inc
	new file:   main/templates/main/home.html
	new file:   main/templates/main/nav.inc
	new file:   main/templates/main/nav_right.inc
	new file:   main/templates/main/tournaments.html
	new file:   main/urls.py
	modified:   main/views.py
Add a kb field into TournamentResult for store the Buchholz score.
Add it field to admin model.
Make some clean code improves.

On branch dev
	modified:   main/admin/game.py
	modified:   main/admin/tournament.py
	modified:   main/admin/tournament_result.py
	new file:   main/migrations/0007_auto__add_field_tournamentresult_kb.py
	modified:   main/models.py
Temp commit.
May be this branch is impasse.

On branch dev
	modified:   chess/settings.py
	modified:   main/admin/game.py
	modified:   main/models.py