(#195) - fix coverage

Apparently istanbul got smarter at some point and caught that
in create-view.js at the line:

    view.seq = lastSeqDoc ? lastSeqDoc.seq : 0;

The first condition was never occurring, due to the caching.
Closing the database and opening another one susses this out.
(pouchdb/pouchdb#445) - use spark md5 instead of jkmeyers
(#181) - Changed not_found status from 400 to 404.
(#191) - parse the indexable string