Merge pull request #22 from aromaron/master

[#63392484] Add a simple list of the proposals sorted by rank
Create a task to get a CSV with CFP top ranked proposals
Update the rank list to use new Proposal method structure
Only organizers can see the proposal ranked list
Little oops
Merge branch 'master' of https://github.com/magmaconf/cfp-magmarails-com

Conflicts:
	app/views/cfp/proposals/index.html.haml