Version 5 patch

As you may know the 5.x dev version does not work. The attached patch has some quick fixes, the features should be the same as the 4.7 version.

List of changes:

• Changed main callback to revision_deletion_page(). Module function names are usually of the form module_name_function.
• Added settings menu item.
• Made drupal_get_form and node_get_types calls version 5 compatible.
• Added revision_deletion_page_form function and change revision_del_submit to revision_deletion_page_form_submit as a result
• By default all node types where selected for revision deletion. I changed it so none were selected initially. This is just a personal preference, don't really mind either way.

I did a quick test and things seem to work as they should. No guarantees though.