correcting links in light of facet change
Merge branch 'master' of github.com:miller-center/cpc
Merge branch 'master' of github.com:miller-center/cpc
Merge branch 'master' of github.com:miller-center/cpc
Adjustments for new collections

Adding U.S. Grant and Founding Fathers Online materials revealed
a need for minor interface and indexing changes.