Remove datatables class from components table

Not used.

Part of cleaning up datatables stuff in regard to #62
Use paginate instead of datatables in docblock

See #62
Fix code style

See #110
Support GET param for logs per page

See #62
Calculate the total number of log pages correctly

See #62
Deprecate the datatables attribute for paginate

The points logs shortcode used to use ‘datatables’, and this is still
supported, but deprecated. ‘paginate’ should be used instead, though
using ‘datatables’ will not give a notice.

See #62
Use paginate instead of datatable in the widgets

The datatable argument is deprecated now.

See #62
Update the points logs shortcode's tests

See #62