moved jubgrid JS to external file

moved jubgrid JS to external file
added isbn and pubdate columns
when jubgrid is used, you have to provide a list of lineitems directly
so it knows how to find the lineitem-attr fields
put jubgrid JS into an object (currently called JUBGrid) to contain
the helper functions and grid references (less global namespace collision opportunities);
updated picklist/view and li_search to use this updated grid
Picklist now stores an array of lineitems refs in addition to the _data object

git-svn-id: svn://svn.open-ils.org/ILS/branches/acq-experiment@9665 dcc99617-32d9-48b4-a31d-7c20da2025e4