Dev fix: API page.info().page should use 0 as the start index not 1

- Math.floor should be used to have page indexes starting at 0 rather
  than 1, since page(n) uses 0 based indexing.
New: Pagination language options (i18n) have _PAGE_ and _PAGES_ options

- Based on the discussion in forum thread 16938 DataTables now has the
  ability to use _PAGE_ and _PAGES_ in addition to the exisiting
  _START_, _END_, _MAX_ and _TOTAL_ options in the information language
  strings. This allows the developer to show paging information rather
  than record based information in the information element.
Merge branch '1_10_wip' of github.com:DataTables/DataTablesSrc into 1_10_wip