- fix function args: names of arguments for postgres did not match names for oracle leading to potential portability problems
- fixing 2 more cases of still incorrect function argument names
- bump version number to 5.8.1a5
cleanup in cr::keyword::* namespace
  one cannot advocate to create a  keyword with
  content::keyword::item_assign and query it with
  cr::keyword::item_get_assigned)

- marked the following function as deprecaed
   * cr::keyword::get_children
   * cr::keyword::get_keyword_id
   * cr::keyword::get_options_flat
   * cr::keyword::item_get_assigned
   * cr::keyword::item_unassign
   * cr::keyword::item_unassign_children

- added new functions:
   * content::keyword::get_children
   * content::keyword::get_keyword_id
   * content::keyword::get_options_flat
   * content::keyword::item_get_assigned
   * content::keyword::item_unassign_children

- updated regression test
cleanup in item::* namespace
  most functions were already moved into the content::item namespace,
  but a few were left.

- marked the following function as deprecated
   * item::get_content
   * item::content_is_null
   * item::get_revision_content
   * item::content_methods_by_type
   * item::publish
   * item::unpublish

- added new functions:
   * content::item::content_is_null
   * content::item::content_methods_by_type
   * content::item::get_content
   * content::item::get_revision_content
   * content::item::publish
   * content::item::unpublish

- updated regression test
- set reminiscent of .ini-files deprecated