Merge pull request #57 from ascott1/plainLangSum

Plain language summary
Update ARM API parameter values
Merge branch 'dev' of github.com:cfpb/owning-a-home into dev
Select largest rate in second comparison dropdown
Merge pull request #58 from contolini/dev

ARM API update and comparison section improvement
swap out 30 year costs for sentence when adjustable rate selected
update comparison term length for arms