Allow failures for HHVM and PHP 5.6

I should learn YML better ;-)

Closes #108
Add a points log factory for the unit tests

Fixes #110
Add method to logs query to get paginated results

See #62
Deprecate the datatables in favor of paginate

Pagination is no longer live. But we may add Ajax next.

See #62
Deprecate wordpoints_enqueue_datatables()

No longer used.

See #62