Actually allow the comic schedule to change.
Merge remote-tracking branch 'origin/feature-specify-comic-days'

Conflicts:
	cartoonist-comics/cartoonist-comics.gemspec
	cartoonist-comics/lib/cartoonist-comics/version.rb
	cartoonist/app/views/admin/settings/show.html.erb
	cartoonist/cartoonist.gemspec
	cartoonist/lib/cartoonist/version.rb