Added one missing check for the presence of fields

 a 'table does not exist' error when deleting a node whose content type was previously
 deleted - related to #107237 core "bug ?"
This area (handle content-type deletion) is still funky and probably needs some more
 work

(+ remove test api hook, since we don't ship with testfile anymore)

#106932 fix install module to account for node_type table that is either renamed or not renamed by core during core installation.

 and KarenS

 thanks jpetso

#104259 add code to create node_content tables and function content_types_rebuild() to fix database if content types are added when CCK is not enabled.

Small fix to body sort in field overview, add field type and module as hidden fields to _content_admin_field form to make programmatic form submission easier, fix url in fields tab table.

#88135 fix Views handling of multiple fields to allow an option to group multiple fields together with one node, patch by yched.

#89172 improved handling for optionwidgets, adding ability to create options as an  array in php or as a list of values. Also fixes View handling, making sure the right value is swapped in for the option in Views tables and lists.