Give the Authority List interface the ability to merge records... almost

Give the Authority List interface the ability to merge records... almost

Separate the interface into separate JavaScript vs markup files

To-do:
  * Provide a middle layer method that accepts the array of records to merge and merges them
  * Teach the mergeRecords() to call that method when it exists
  * Provide a way of reordering the records or otherwise flagging which record should be the lead
  * Prevent the same record from being added to the merge slushbox twice

git-svn-id: svn://svn.open-ils.org/ILS/trunk@17275 dcc99617-32d9-48b4-a31d-7c20da2025e4