Reword overview page
Disable pointer events on mini-graphs on political overview screen
Replace 'Credit' with 'Approve'
Merge branch 'master' into develop
Display coefficient on overview page
Display coefficient on chart page (for correlated charts only)
Remove coefficient from chart page as we already have 'Statistical strength'
Correctly display years
Merge branch 'develop' into feature/newdata

Conflicts:
	www-src/app/scripts/controllers/chart/correlated.coffee