Changes theme_datatables to use drupal_add_library

-Alters preprocess function to depend on template_preprocess_views_view_table().
-Adds proper AJAX handling to prevent loading multiple settings for initialized datatables.

#869724 by anschauung, duellj: Adds additional options to view style, including pager styles, Theming configuration, and hidden and expandable columns.
Updates template_preprocess_datatables_view() with table plugin changes.
Fixes options form markup.

#868378: Attempts to autodetect field types for correct sorting

Updated Documentation

Fix default sorting column and ordering.