simplify runPagedQuery

removed workaround for fixed cassandra issue
use cassandra 1.2.16 on travis
clean up test comment
Merge branch 'simplifyRunPagedQuery' of https://github.com/stuartf/Hilary into simplifyRunPagedQuery
work around cassandra returning an extra row
Merge branch 'simplifyRunPagedQuery' of https://github.com/stuartf/Hilary into simplifyRunPagedQuery
Documentation improvements