Fix for Bug 5006 - Invalid XHTML in record matching rules template

Fix for Bug 5006 - Invalid XHTML in record matching rules template

- Rework JavaScript clone routines to use jQuery, to take
  label "for" into account, to handle incrementing label,
  and to properly place cloned blocks at the bottom of the group
- Rework JavaScript delete routines to use jQuery, to take
  block label numbers into account, and to show the "add"
  link if you have deleted the last block.
- Correcting markup which nests <div> inside <fieldset>
- Ensuring labels' "for" attribute matches input IDs
- Adding "required" style to required fields

Signed-off-by: Chris Nighswonger <chris.nighswonger@gmail.com>