* 'image_display' parameter is no longer required. the image will not be resized if this parameter is empty.
* 'resolution' parater is now respected. it was just ignored before.
* creates a shorter URL.


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@39220 20353a03-c40f-0410-a6d1-a30d3c3de9de