add indexOf polyfill for IE8
add better placeholder polyfill for IE8
Merge pull request #234 from ascott1/rc-release

MOAR IE8 FIXES
corrected link at the top of the rate checker to point to owning a home landing page
Merge pull request #237 from stephanieosan/loan-types-final-content

corrected link at the top of the rate checker
Merge branch 'master' of github.com:cfpb/owning-a-home