ADD: get_page_count() now falls back to ImageMagick if exiftool isn't available.

* This gets the job done, too, it's just a bit slower. Still better than nothing.


git-svn-id: http://svn.resourcespace.org/svn/resourcespace@5796 c08608d7-6e46-0410-86ca-f2a6f1370df5
FIX: removed superfluous per-image-size SQL query in get_image_sizes().

* The resource type is already retrieved once at the beginning of the
  function.



git-svn-id: http://svn.resourcespace.org/svn/resourcespace@5797 c08608d7-6e46-0410-86ca-f2a6f1370df5
ADD ability to specify resource type in config_add_single_ftype_select and config_add_multi_ftype_select. Defaults to false to preserve original functionality

git-svn-id: http://svn.resourcespace.org/svn/resourcespace@5798 c08608d7-6e46-0410-86ca-f2a6f1370df5