Narrative bubble elements now have unique ID

Matches ID from DB
Popover + tooltip

affordance for initial task + embedded html for tooltip and popover
Popover content moved to new file

Also stealth fix for the space in narrative id
Fixed previous commit

Stealth change to narratives helper
Text changes

Cosmetic
Sunburst segments have unique IDs

Should help testing
Revert "Sunburst segments have unique IDs"

This reverts commit 677c5a605cdec9880edd6be3363e2e4c3d9bc5bf.
Revert "Revert "Sunburst segments have unique IDs""

This reverts commit 0e828923ede6b91b7af72c7a5396ec30aeb4809a.
Use partial correctly for the tutorial popover
Added sort by disagrees and fixed sort by time uploaded bug
Merge pull request #43 from felixsoum/frontend-dev

Frontend dev
Merge pull request #42 from felixsoum/backend-dev

Backend dev
Merge branch 'frontend' into backend

Conflicts:
	app/controllers/user_controller.rb
	app/views/narratives/play.html.erb
	db/development.sqlite3