Merge pull request #63 from ascott1/dev

Better chart tooltips
Improve slider range positioning
Merge branch 'dev' of github.com:cfpb/owning-a-home into dev
Merge pull request #64 from ascott1/dev

Various alert updates
Merge branch 'dev' of github.com:cfpb/owning-a-home into dev
Improve credit score slider
update comparison to 15 years when 15 year term is selected